1877.] Recent Literature. 681 
RECENT LITERATURE. 
Bosretzky’s RESEARCHES ON THE DEVELOPMENT OF CEPHALOP- 
opa.’— This is an elaborate work on the development of the cuttle-fishes 
belonging to the genera Loligo and Sepia. It is based on thin sections 
of the eggs, and has every appearance, from the plates, of being a critical 
and ithatuitive treatise. Although the text is in Russian, an explana- 
tion of the plates is given in German. It is unfortunate for the En- 
glish reader that no synopsis of the points made by the author is given 
either in French or German. Professor Bobretzky is also the author 
of a work on the embryology of the Crustacea, published at Kiew in 1873, 
and of later works on the same subject. Russia is rapidly taking the 
foremost rank in zodlogy. In comparative embryology she is at this 
moment on the whole in advance of England, the United States, or France. 
Such embryologists as Rowslevaky,, Metznikoff, Bobretzsky, Ganin, 
Melnikow, and Ussow, nearly all, we believe, trained in German univer- 
sities, have carried Russian biological science to high-water mark. 
Ninta Annuat Report or THE U. S. GEOLOGICAL AND GEO- 
GRAPHICAL SURVEY OF THE TERRITORIES.? — This Report shows the 
work done by the Survey in Colorado during 1875. Dr. Hayden an- 
nounces that a map of the State is nearly ready, and when finished 
“Colorado will have a better map than any othér State in the Union, 
and the work will be of such a character that it will never need to be 
done again. Colorado will never support so dense a population that a 
more detailed survey will be required. 
The Report forms a bulky volume of over eight hundred pages. Part 
I., Geology, contains ‘the report of Dr. C. A. Peale, F. M. Endlich and 
W. H. Holmes, and B. F. Mudge. Part II., Geography and Topography, 
comprises the reports of A. D. Wilson, Henry Gannett, G. B. Chitten- 
en and G. R. Bechler. Part IIL, Zoölogy, contains the History of the 
American Bison, by J. A. Allen, and a Report on the Rocky Mount- 
ain Locust and other Insects now injuring or likely to injure Field and 
Garden Crops in the Western States and Territories, by A. S. Pack- 
ard 
. 
List OF THE VERTEBRATED ANIMALS IN THE fosok ZooLOGICAL 
_ Garpen.* — This list forms a bulky volume, handsomely illustrated with 
1 Untersuchungen über die renee der Conhalopoden. Von Dr. N. BOBRET- 
ZKY aus Kiew. (Nachrichten der K. Gesellschaft der Freunde der oe ae 
niss, Tati Naas und Ethnographie bei der Universität Moskow. Bd. xxiv. 
1, Moscow, 1877. 4to, pp. 73, with ten plates 
g Ninth TP Report of the U. S. Geological and Geographical Survey of the Terri- 
5 
4 Washington, 1877. 8vo, pp. 827, with seventy plates and numerous maps. 
: List of the Vertebrated Animals now or lately living in the te of the Zoblogical 
s Societ ociety of London. Sixth edition. 1877. London. 8vo, pp. 5 
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