THE author begs to preface the following Cata logue of Testaceological Writers by an acknowledgement of his being indebted for the substance of it to a paper in vol. vii. of the Linnæan Transactions, by Dr. Maton and the Rev. Mr. Rackett. It is so perfect a compendium of the subject, that he trusts he need offer no apology for wishing to render it more generally useful, by putting it into a form which is capable of wider dissemination than the work in which it is at present extant. In altering the arrangement from a chronological into an alphabetical one, he by no means wishes to imply that he considers the former method exceptionable, but only less adapted to an elementary treatise intended rather for the horn-book of learners, than for the information of the scientific.

THE numerals which are placed after the name of the conchological author refer to the nature of the work, the title of which is given immediately afterwards in Italics. By these numerals will be designated the branch of science which each writer has pursued; and by comparing them with the an

nexed arrangement, it will be known at once what sort of instruction is to be expected from his labours.

Testaceological writers are to be classed as fol

lows :

I. Those who have written generally of Conchology.

II. Those who have described a single genus, family, or species.

III.

Those who have described the shells of certain parts of the globe.

IV. Those who have described museums or collections of shells.

V. Those who have described minute shells,

microscopic subjects.

VI. Those who have detailed the wonders of

VII.

the science.

Those who have written on the anatomy of testaceous worms.

VIII. Those who have written on their phy

IX.

siology.

Those who have invented or followed a systematical arrangement of shells.

X. Those who have commented on the works

of others.

XI. Those who have published plates illustrating Conchology.

WRITERS ON CONCHOLOGY.

A

ADAMS JOHN. III. V. Description of minute Shells found on the Coast of Pembrokeshire.

"Trans. Linn. Soc." vol. 3. p. 64. 68. 252. 254. vol. 5. p. 1—6.

ADANSON MICH. II. III. IX. Déscription d'une nouvelle Espèce de Ver qui ronge Bois et les Vaisseaux, observée en Senegal. "Mém.de l'Acad. des. Sc." 1759. p. 249-278, with plates.

Histoire Naturelle du Senegal. Paris 1757. 4to. with 19 plates.

In his Histoire Naturelle du Senegal. ALBERTUS MAGNUS. I. De Animalibus. Venet. 1795.

fol.

ALDROVANDUS. I. De mollibus Crustaceis, Testaceis, et Zoophytis. Vol. III. Bononiæ, 1606. fol.

with wooden cuts.

ÆLIAN. I. Died about A. D. 140.

Περι Ζωων Ιδιότητος.

P