1884.] Recent Literature. IJI 
ion, and considers him wrong in a number of other points. He 
describes a division which is only known in Actinospherum, 
where it was described some time ago by Grube. 
The principal thing is that it begins with a change in the nu- 
cleolus, which breaks up into a great many little particles. These 
particles are arranged in a definite way so as to form different 
figures, of which the rod-like form (stabchenform) is the most 
common and characteristic. The substance of the nucleus is not 
modified at all, and only its exterior form is changed. Froma 
spherical vessel it changes to an elliptical, and then eo a biscuit- 
shaped body, after which stage the division takes 
Will also criticises the “ keimblaschentheorie ” of A. Brandt, 
thelial as well as the blastodermic cells. Will finds that this basis 
is false and consequently the theory built upon it is also false— ~ 
B. Sharp. 
RECENT BOOKS AND PAMPHLETS. 
» and Kingsley, J. S e Standard Library of Natural History, by uh 
leadin ee sip T Beaton; 1883, Cassino & Co. Nos. 1-8. Fro 
ers 
Martin, N., and Brooks, W. K.—Studies from the Biological Laboratory, sae 
Hopkins University, Baltimore, 1883. Vol. 11, No. 4. From the editors 
Simmonds, P. L.—A Sag pet Be x eed Animals and their Products, with a Glos- 
. aa 1883, E. an N. Spon, From the publishers, 
Sclater, P. L—List oí the Zire Animals now or lately ee in the pim 
of the Zoölogical Society of London. 1883. From the society. 
Kiprijanow, = —Studien nee die Fossilen Reptilien wa ie 111 Thiel. Grup- 
pe Thaumatosauria n Theil. Ordnung Crocodilia. St. Petersburg, 1885. 
Fr rom the . duthor. ` 
Albrecht, P.—Note sur le Pelvisternum des Edentés ; 
——Sur le Crane Remarquable d’une Idiote de 21 an 
se Se aly sr Intercostdidales et les ees raii du sacrum des mam- 
hyses ós 
(Hatteria punctata Gra 
Sur la valeur morphologique de Varticulation mandibulaire, du cart! ilage de 
Mickel, et des osselets de louie, etc. All dated Bruxelles, 1883, and from the 
— rN osseuses sur les Apophyses épineuses des vertèbres d’un Reptile 
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Miter, g 4. —Glyptocrinus redefined z restricted, Gaurocrinus, Pycnocrinus and 
iae anede and two new species described. Ext, Jour. Cin. Soc. 
Nat, Hist., rom the aio 
Halt, J, k uie of the machinery and methods of cutting specimens of Rocks 
ni abi ils at the N. Y. State Museum of Natural History. 1883. From the 
R. ley, W, F. E.—New a fossils. From the author 
set ioe N. A.—A note on the foeces of pde i infants. Ext. Trans. Coll. 
Schip Physicians of Phila, 1883. From the a 
sser, Mf.—Ueber die extremititen des Anoplorberium Ext. Neuen Jahrb.. für. 
Min. Geol. und Paliont, 1883. 
ne E. D.—The Evidence = Evolution i in ies History of the extinct Mammalia. 
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n the contents of a ticki cave in the Island of Angat West Indies. Wash- 
ington, 1883, 
