ZOOLOGY 575 



B. K. Das describes the result of dissecting Indian mammals 

 for the purpose of ascertaining the frequency of the occurrence 

 of truncated umbilical arteries. Of twenty-eight species 

 examined, all but two exhibited this peculiarity. Whether the 

 presence of these truncated arteries is correlated with existence 

 in a tropical climate, or whether they are merely conspicuous 

 embryonic vestiges of no particular function, it is impossible 

 to decide until the mammals of other tropical countries are 

 investigated. 



In comparing the mammalian and reptilian coracoids, 

 A. S. Romer (" The Comparison of Mammalian and Reptilian 

 Coracoids," Anat. Rec, vol. xxiv. No. 2, Sept. 1922) agrees 

 that the mammalian coracoid is the posterior coracoid element 

 of primitive and mammal-like reptiles, as stated by Broom 

 and Watson. " The modern reptilian * coracoid ' is homologous 

 with the primitive anterior element and the epicoracoid of 

 monotremes. The so-called epicoracoid of modern reptiles 

 is a cartilage which may be compared with a variable anterior 

 and ventral cartilage in extinct reptiles and a similarly placed 

 cartilage in monotremes." 



Papers of special importance to the systematic zoologist 

 are those of W. R. B. Oliver on " A Review of the Cetacea of 

 the New Zealand Seas " ; Sir S. F. Harmer, " On Commerson's 

 Dolphin and other Species of Cephalorhynchus " ; C. F. Sonntag, 

 " The Comparative Anatomy of the Tongues of the Mammalia " 

 VII; and R, I, Pocock's " The External Characters of Sear- 

 turus and other Jerboas, compared with those of Zapiis and 

 Pedetes,'' all in the Proc. Zool. Soc. Lond., Part III, 1922. 



Other important papers are : 



Appleton, a. B., " On the Hypotrochanteric Fossa and Accessory Adductor 



Groove of the Primate Femur," Jour, of Anat., vol. Ivi, Parts III and IV. 

 Carey, E. J., " Studies in the Dynamics of Histogenesis. Intermittent 



Traction and Contraction of Differential Growth, as a Stimulus to 



Myogenesis, XI : The Dynamics of the Pectoralis Major Tendon," 



Anat. Rec, vol. xxiv. No. 3, Oct. 1922. 

 Groebbels, F., " Der Hypoglossus der Vogel," Zool. Jahr., vol. xliii. No. 4, 



1922. 

 Kesteven, H. L., "A New Interpretation of the Bones in the Palate and 



Upper Jaw of Fishes," Jour, of Anat., vol. Ivi, Parts III and IV. 

 Smith, Sir F., " Anatomical Notes on the Accessory Organs of the Eye of 



the Horse," Jour, of Anat., vol. Ivi, Parts III and IV. 

 Sullivan, W. E., " The Function of Articular Discs," Anat. Rec, vol, xxiv. 



No. 2, Sept. 1922. 

 Wood Jones, F., " On the Dental Characters of Certain Australian Rats," 



Proc Zool. Soc, Part III, 1922. 



General Experimental Zoology. — A case of true hermaphro- 

 ditism in the fowl is described b}^ C. G. Hartman and 

 W. F. Hamilton in the Jour, of Expt. Zool., vol. xxxvi. No. 2, 



