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I obtained one imperfect specimen at Shoukbeng on the Prome and Tongoop road, close to the summit of the hills. 7. ALYCJEUS NITIDUS, n. s.
Testa. anguste umbilicata, depresse turbinata, solidula, fulv0-eornea, nitida, polita, translucens. Spira conoidea, lateribus convexis, apice obtusa, sutura. impressa. Anfr. 41 convexi, ultimus ad periphe
riam subangulato-compressus, subtus planulato-convexus, ad latus breviter tumidus, ibidem confertissime costulatus. Spatium constrictum longum, nitidum, lirfi. retro-recumbente, parum elevatfi, prope regionem inflatam munitum. Tubulum suturale breve. Aperture diagonalis, undata, circularis. Peristoma ad basin antice, superne prope anfractum penultimum retro sinuatum, duplex; interno continue, breviter porrecto, basi canaliculato; externo expanse, retro
relicto, in processum auriformem subtns producto. Operc. tenue, corneum, multispirum.
Diam. maj. 3% or 0.141
Hab. prope Tongoop in Arakan.
This very pretty and distinct little species occurred rarely at the roots of trees near Thaloo and Bandiyo, on the Prome and Tongoop road, not far from the last-named place. It combines the canaliculate inner peristome of A. succineus with an ear-shaped process like that at the base of A. polygonoma, while the ridge on the peristome is curved backwards in a similar manner to that in A. 72-ebes, Bens. A. gemmula, Bens. and A. Footei, Blanf. although much less elevated than in either of those species, to which the shell now described has otherwise but little resemblance. The somewhat flattened base is peculiar.
The preceding 7 species shew how numerous must be the forms belonging to this peculiar and Well marked little genus. Ten species, including A. umbonalis, armillatus and sculptilis of’ Mr. Benson, have now been described from the partially explored provinces of Pegu and Arakan.*
* Since the above was written I have obtained 2 more species from Upper Burma.
8. Anrcaaus Tnnomnnr, n. s.
Testa apcrte umbilicata, conoideo-depressa, corrico-albida, translucens, costulis elevatis, sinuatis, remotis ornate, inter costulas striatula. Spira depresso-conica, apice obtusula, sutura impressa. Anfractus 3% convexi, ultimus ad latus mediocriter tumidus, ibidem confertissime costulatus. Spatium constrictum longum, striatulum, medio tumidum. Tubulum suturale mediocre, % peripheria: subwquans. Apertura obliqua, expandiens, eireularis; peristoma ad anfractum penultimum breviter interruptum, marginibus callo junctis, duplcx; externo expansulo, interno breviter porrecto. Operc: corneum, multispirum, extcrnc perconcavum, nucleo centrali interno prominente papillari.
Hab. cum A. hcbeti in montibus Khasi, teste W. Theobald, Jun.
I received two specimens of this species from Mr. Theobald as A. hebes, Bens. of which they were supposed to be young shells. They, however, prove, on closer examination, to be fully grown and distinct, the slight swelling in the centre of the constriction contrasting strongly with the high reeurved ridge in A. kebes. This alone would shew the present to be a different species, but it is also distinguished by its lower spire, narrower umbilicus, smaller size, and thinner and interrupted peristome, the last character not occurring in any other species of the genus. The well-marked distant costulation of the upper whorls of A. Tkeobaldi is entirely wanting in A. hebes. The operculum of the latter does not appear to have been described. A single specimen in my possession is dark horny, indistinctly multispiral, extremely concave in front, and convex, almost conical, behind, and deficient in the central internal boss so prominent in most Alycwi. _
Although there is a swelling in the centre of the constriction in A. Theobaldi, it does not amount to a marked ridge, such as characterizes the typical forms of the section Charax of Mr. Benson, e. g. A. stylifer, B. It is consequently not clear whether this species should be classed with the members of that section, or with those of
the typical group. Several species indeed tend to connect these two subdivisions, which more recent discoveries have rendered less distinet than they appeared to be when first described.
9. CYCLOPHORUS PATENS, n. s.
Testa. subanguste umbilicata, globoso-turbinata, nitida, subglabra, oblique striatula, subtilissime decussata, albida, plerumque obsolete fulvo-strigata, fascia unica, 2-3 m.m. lata, nigricante castanea, infra peripheriam circumdata; rarius superne purpurascenti-castanco-picta vel strigata, subtus castanea, periomphalo solo alhido. Spira. conica apice aeutiuscula, sutura impressa. Anfr. 5-5% convexi, ultimus rotundatus, vix descendens ; umbilicus pervius. Aperture. fere verticalis, circularis, intus flaveola, peristoma simplex, breviter adnatum, sublate angulatim planulato-expansum, margine columellari refiexum, fulvum, laate aurantiacum vel fiammeum. Operc. distincte 6-spiratum, corneum, nucleo centrali interno minime prominente.
" m.m. inches m.m. inches
Diam. maj. (exempli majoris,) 38 or 1.5 minoris, 29 or 1.16 ,, min. ,, 29 1.1. ,, 21 0.82 Alt. 26 1 ,, 19 0.75
Ap. diam. intus, 17 0.6 ,, 13 0.5
Hab. circa Thayet Myo, Prome, et Henzada, in provincifi Pegu.
This species is remarkable for its flat, disk-shaped expanded per'is,tome, usually of a. bright orange or scarlet colour, and for the absence of marked sculpture, and, in most specimens, of any conspicuous coloration, except a single broad dark chesnut stripe below the periphery.
10. DIPLOMMATINA srnmm, ii. s.
Testa. dextrorsa, non rima.ta,ovato-conica, subfusiformis, solidiuscula, pallide cornea, subremote verticaliter costulata. Spira. conica, apice acuta, sutura. impressa. Anfr. 61; convexi ; antepenultimus major, tumidus; ultimus antiee vix ascendens. Apertura verticalis, subtus antice sinuata, late auricularis, plies. columellari validfi munita; perist: subduplex, expansum, margine columellari sinuato et ad basin angulo acuto desinente, eallo parietali mediocri.
H-ab. in montibus Arakan a Pegu secernentibus.
But two perfect specimens of this shell occurred to me at Moditoung on the Prome and Tongoop road, together with Alycaaus graphicus, 81.0. It resembles D. pachyckeilus, B. in the shape of the mouth, but is distinguished by the slighter rise of the last whorl, and by its subremote costulate sculpture, which, together with its less rounded aperture, serves also to distinguish it from D. di]2Zo0keilus, B. D. pullula, B. and D. Blanfbrdiana, B. the two latter of which are closely costulated, and the first named smooth.
I have met with two othermspecies of Diplommatina in Pegu, both apparently \111(lBSCI‘ll)Gd.* The genus had not previously been met with in the Burmese peninsula.
During the past year (1861) I have found Hydrocena pg/xix, B. as far South as the neighbourhood of I-Ienzada. Cfyclophorus fulguratus, Pfeifier, O. Theobaldianus, B. and C’. patens, appear to occur, the former abundantly, the others sparingly, throughout the greaterr portion of Pegu, west of the Irrawaddy. A small Pupina is common at Thondoung near Thayet Myo and in several places furthe €O11tl1.
Leptopoma aspirans, B. occurs among Captain Ingram’s Arakan collections. Two large species of Cyclophorus, one of which may perhaps be a variety of C‘. aurantiaous, Schum. werefound near Tongoop. A solitary specimen of a small Helicina, allied to H. Andamanica, B. was obtained from Ramri Island.1'
Thayet Myo, August, 1861.
Since the above paper has been written, undeserihed forms have accumulated upon my hands. Of these the most interesting are a second species of the genus Hypselostoma from Ava, whence I have also had the good fortune to obtain two more Alycaai and two Diplommatima, as well as a very singular little operculate shell allied to the anomalous Pterocgclas hispidus, Pearson. Two new species of Helix of the section plectopylis of Benson have also occurred to me and a very considerable number of other novelties.
Bassein, March, 1862.
Q Two other distinct species have since been obtained in Upper Burma.
1‘ Both Lepiopoma aspirana and the small Helicina referred to above, have since been found abundantly in the South Western extremity of Pegu. They are there associated with the Darjiliug and Klmsi Helix plectostama, B.
In Contributions to Indian Mala-cologg, No. LI. Vol. XXX. pp. 341711--366. Page Line '
347d 24- from top for Madras and Calcutta read Madras to Calcutta.
31-8 8 from bottom for anfractos intenos read anfractua iuternos. 349 2 from top for recumbentem; peristomat-is read recumbeutem, peris~ tomatis. ,, 4 from top for sutaralis read suturalig.
,, 11 from bottom for globosa turbinata read globoso-turbinnta.
359 3, 8, 15 and 22 also p. 364 lines 7, 8, 18 and p. 366 line 5 from bottom for Perotteti read Perrotteti.
,, 14 from bottom for euperiori read superiores.
360 7 from top for lutia albida read luteo-albida.
361 9 from top for obliquily read obliquely.
363 5 from top for simicircularis read semicircularis.
865 14 from top for nilagriea read nilagarica.
366 13 from top for Dipplommatina read Diplommatina.
,, 18 from bottom for tricuinata read tricurinatu.
The above are the most important errata, several minor faults of misplaced punctuation, &c. occur, but they are Obvious. W. T. Bmrzroxv.