RECENT LITERATURE 
243 
extremities of a bifid caecum, but those of Cyclothurus are new formations which 
do not correspond to the morphological caecum. The primitive mammalian 
caecum was an asymmetrical structure derived from the anti-mesenteric border 
of the colon. 
— A. H. Schultz. 
Nomai, J. Das Stimmorgan der Primaten. Anatom. Hefte, vol. 59, 1. 
Abt., pp. 257-292. 1920. 
This study shows the generally high development of the larynx in primates. 
The laryngeal cartilages in monkeys and apes resemble closely those structures 
in man, but the vocal lips are quite different. The arytaenoid cartilages are 
slender and delicate when compared with those of lemurs and all other mammals. 
— A. H. Schultz. 
Doflein, F. Die Fortpplanzung, die Schwangerschaft und das Gebaren 
DER Saugetiere. Jena, 70 pp. 1920. 
A richly illustrated good review of our knowledge of fertilization, implanta- 
tion, placentation, pregnancy, and birth in mammals. The paper contains no 
actually new facts but constitutes a new presentation and welcome collection of 
widely scattered data. 
— A. H. Schultz. 
Asomi, Goichi. Observations on the follicular atresia in the rabbit ovary. 
Anat. Rec., vol. 18, no. 4, pp. 323-343. May 20 (June), 1920. 
Baldwin, Francis Marsh. Notes on the branches of the aorta (arcus aortae) 
and the subclavian artery of the rabbit. Anat. Rec., vol. 19, pp. 173-183, 
11 figs. July 20, 1920. , 
Black, Davidson. Studies on endocranial anatomy. II. On the endocranial 
‘ anatomy of Oreodon (Mcrycoidodon). Journ. Comp. Neurology, vol. 32, 
pp. 271-327, 48 figs. December, 1920. (Concludes that Oreodon was a 
primitive artiodactyl, presenting a curious blending of suilline and ruminant 
characters; any edentate resemblances are of a superficial nature.) 
Burrell, Harry. Preliminary note on the breeding of Ornithorhynchus in 
1920. Australian Zook, vol. 2, pt. 2, pp. 20-23, 2 plates. April 11, 1921. 
(Of the 11 nests studied, 6 contained eggs and 5 contained young; the number 
of eggs ranges from 1 to 3.) 
Cadwalder, Williams B. Forty-ninth annual report of the Board of Directors 
of the Zoological Society of Philadelphia. Pp. 1-50. 1921. (Includes 
report of Dr. Herbert Fox, pathologist.) 
CooPiaa, A. R. A case of the inferior vena cava uniting with the azygos vein 
in the dog. Anat. Rec., vol. 17, pp. 299-306, 2 figs. January 20 (February), 
1920. 
Dreyer, W. Vejleder i Zoologisk Have. Pp. 1-72, many figs. Kjobenhavn, 
1921. (Guide to the Copenhagen zoological gardens.) 
Gillespie, T. H. Annual report of the Zoological Society of Scotland for the 
year ending 31st March 1921. Pp. 1-20, 8 plates. 1921. 
