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Gill on the gurnard commonly known as Prionotus stearnsi, The February number of the Johns Hopkins Hospital which is made the type of a new genus.

Bulletin (vol. xvi., No. 167) is mainly devoted to anatomy.

The teaching of anatomy is discussed by Mr. Mall, who The structure of the squamoso-parietal crest in the skulls

also writes on the working of the Anatomy Act (C.S.A.) of the horned dinosaurs of the Cretaceous of Alberta is

and preservation of material, and the anatomical department deemed by Mr. L. M. Lambe of sufficient interest to merit

of the University of California is described by Dr. Flint. a paper by itself, and he has accordingly described this part

Three papers dealing with points in the development of the of the skeleton in a recent issue of the Transactions of the

kidney, a review of Flechsig's researches on the brain, and Royal Society of Canada (vol. x., sect. iv.).

an article on body-snatching in England complete the OUR weekly budget includes copies of Nos. 3

and

4

of contents of an excellent number. the Sitzungsberichte of the Vienna Academy for the current year. Among the notes is one by Prof. Molisch on phos

On the subject of the mandrake or mandragora, Mr phorescence in eggs and potatoes after cooking, and a

C. B. Randolph has collated, in the Proceedings of the second by Dr. F. Werner on the Orthoptera of the Egyptian

American Academy of Arts and Sciences (vol. xl., No. 12), Sudan.

a number of references from the classics, from which he

concludes that, on account of its narcotic qualities, it was In the January number of the American Naturalist, Mr. employed as an anæsthetic about the first century of the J. Stafford discusses the larva and spat of the Canadian Christian era. oyster, the latter of which is extremely minute and very difficult to discover. Unlike the later stages, the very young

EXPERIMENTS by Mr. E. S. Salmon showing that “ biologie spat presents a dark metallic lustre. When once recognised, forms " of Erysiphe graminis can be identified according to the young spat is, however, by no means difficult to discover, their power of infecting different species of cereals have and the sailors soon became adepts in the search. Although

been previously referred to. Pursuing his investigations on found on many kinds of shells, and sometimes on stones,

the subject, Mr. Salmon states, in the Annals of Botary the spat displays a preference for the young of Crepidula (January, 1905), that portions of a host plant which is fornicata and colonies of Ralfsia verrucosa.

normally immune, become susceptible to infection by the

fungal conidia if they are injured or subjected to heat or To the Biologisches Centralblatt of February 15, Mr. the action of anæsthetics, but the conidia produced as a J. P. Lotsy contributes an article on X-generation and result of such infection cannot attack a healthy plant of 2X-generation," in which he proposes a theory to explain the same species. The practical application of this fact is certain features connected with cell-development and heredity. far reaching, as a wheat-rust can in this way spread to In the second article in the same issue Mr. E. Wasmann barley leaves which have been injured by animals or storms. seeks to explain the origin and development of slavery among ants, showing the manner in which a colony of Formica

With the object of arousing interest in the subject of truncicola may have been gradually modified from a type

the giant trees of Victoria-all species of Eucalyptus, Nr. in which a certain number of stranger ants were received N. J. Caire has collected data as to size, neight, and as guests, to one in which a host of captives are maintained. localities of specimens known to him in a paper published

in the Victorian Naturalist (January, 1905). Big Ben, a The Otago Daily Times of January 6 contains an article specimen of Eucalyptus amygdalinus, possessing a trunk of on the marine fish-hatchery at Portobello and the progress 57 feet girth, was destroyed by a bush fire in 1902, and recently made there. The institution was nominally opened Billy Barlow, a blackbutt of the same circumference, was a year ago last January, but it was by no means in good sacrificed for the Paris Exhibition ; both these veterans working order, having to contend with such difficulties as

were probably more than a thousand years old. Most of leaky tanks. Work during the past year has been these trees of enormous girth present signs of senile decay, great extent confined to observing the behaviour of a few as shown by broken tops or later by hollow stems. kinds of food-fishes in captivity. Many of these died off quickly when introduced into the tanks, some, apparently, on

The results of recent experiments have proved (00account of having been injured in their capture, and others clusively, says the Pioneer Mail, that silk of excellent quality owing to a difference in the temperature of the water. Blue can be raised in Ceylon, and samples of cocoons raised * cod, however, thrive well, although the endeavours to rear Peradeniya from European seed have been classed by a the fry were unsuccessful. The introduction of the European European expert as second only to the best Italian silk. lobster is contemplated.

Hitherto all experiments have been on a small scale, limited MR. L. FREDERICO, director of the class of science in the

partly by the comparative scarcity of mulberry trees. The

time seems now to have arrived when more extensive operaBelgian Royal Academy, sends us a copy of an essay (from

tions might be undertaken with advantage ; and, with ths the Bulletin of the Academy for December last) on the Glacial object, it is proposed that an experimental silkworm rearing fauna and flora of the plateau of Baraque-Michel, the establishment be created. A scheme is under considerarico culminating point of the Ardennes. The boreal conditions by the Ceylon Board of Agriculture. of climate have, it appears, preserved on this exposed plateau a small colony of animals and plants of an essentially arctic

Some interesting observations of the spark discharge trom type, the nearest relatives of which are to be met with

a Holtz machine are described in a paper by Dr. L only in the extreme north, and on certain much higher Amaduzzi in the Atti of the Italian Electrotechnical Ascon mountains in central Europe. This assemblage seems to

ciation for 1904. Marked variations in the character of the be at the critical stage as regards temperature, a very slight discharge were observed with varying atmospheric condielevation of which would lead to its disappearance. We

tions, thus have a definite refutation of the prevailing idea that The peculiar photographic activity of hydrogen peros de the temperature of this part of Europe has been higher at has recently been considered by Graetz to be due to a some date since the Glacial epoch than it is at the present special radiation, in virtue of the fact that its influence day.

is capable of penetrating solid bodies, particularly this

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