THE GENERAL SUBJECT. 
Mamm. 7 
considerable space being allotted to the Mammalia. Full references are 
given to all the works and papers cited. 
Severtzoff, N. The Mammals of Turkestan. Ann. N. H. (4) xviii. 
pp. 40-57, 168-174, 208-225, 325-336, 377-388. 
A translation of the part of the “ Turkestanskie Jevotnie ” relating 
to Mammals [c/. Zool. Rec. x. p. 6], by F. C. Craemers, with some addi- 
tional notes by the author. The Recorder has added some references to 
recent memoirs ; and G. E. Dobson remarks on the Bats described, 
tom. cit. pp. 130-132. 
Tomes, 0. S. A Manual of Dental Anatomy, Human and Compara- 
tive. London : sm. 8vo, 1876. Mammalia^ pp. 241-400. 
A concise review of the dentition of both recent and extinct Mam- 
mals, illustrated with many woodcuts. 
Trosciiel, F. H. Bericht iiber die Leistungen in der Naturgeschichtd" 
der Saiigethiere wiihrend des Jahres 1875. Arch. f. Nat. 1876, ii. 
pp. 1-37. 
Turner, W. Some General Observations on the Placenta, with espe- 
cial reference to the Theory of Evolution. J. Anat. Phys. xi. 
pp. 33-53. 
Comes to the conclusion that the placenta cannot be accepted as a 
dominant organ for purposes of classification. \_Cf. infra, pp. 10, 23.] ' 
Van BeNeden, E. La Maturation de l oeuf, la Fecondation, et les pre- 
mieres Phases du D^veloppement embryonnaire des Mammifcres. 
J. Zool. V. pp. 10-56. 
A summary of observations on the development of the ova in the Rab- 
bit ; generalizations on the facts noted are postponed. 
Wallace, A. R. The Geographical Distribution of Atiimals. London : 
1876, 2 vols. 8vo. pp. 503-607. 
A considerable part of this most important w'ork is devoted to the 
Mammalia. Besides the discussion of the genera characteristic of each 
of the zoological regions and sub-regions, the classification of Mammals 
is considered (i. pp. 85-90), the distribution of the extinct forms (i. 
pp. 107-160), and that of existing families and genera (ii. pp. 170-254). 
The author believes that the principal groups first appeared in tie 
northern hemisphere, from which the southern continents were peopled 
by successive waves of migration. 
Yarrow, H. C. Notes upon Geographical Distribution and Variation, 
with regard to the Zoology of the Western United States, as relates 
more particularly to Mammals and Birds. Wheeler’s Rep. Expl. 
W. of 100th M., V. (1875) pp. 15-34. 
. [See OouES, E.] 
W. VON Bisciioff contradicts the statement in E. Hiickel’s ‘‘ Anthro- 
pogenie,” that the ova and young embryos of Man and other Mammals 
are not distinguishable. SB, bayer. Ak. 1876, p. 1. 
