42 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 70 



The postgastric portion of the gut was all of the same character, 

 with a uniform width of about 10 mm. and a length of 630 cm. 

 There are very sharply differentiated, longitudinal plications upon 

 the entire inner surface. 



The alimentary tract was not only without discernible intestinal 

 parasites, but was absolutely empty, suggesting that the animal had 

 been impounded for some time before it was killed. 



ManiTnae. — The slit of each mammary orifice communicates 

 directly with a dilated mammary duct of generous proportions, this 

 varying from 10 to 15 mm. in diameter and with a length of about 

 100 mm., it being directed craniad. Anteriorly it is more flattened 

 and its walls are broken up into numerous and large galactoferous 

 sinuses, these in turn being surrounded by mammary glandular 

 tissue of the usual character. The large capacity of the mammary 

 duct, size of the mammary orifice, and lack of any external promi- 

 nence, as well as the presence at this point of superficial musculature, 

 indicates that the young probably do not nurse by sucking in the 

 accepted fashion, but rather that milk is either forced into the mouth 

 chiefly by muscular action of the dam, or that the offspring itself 

 does the forcing by means of butting against its mother. 



Within the mammary duct was a single long, vermiform parasite, 

 and encisted in the mammary glandular tissue were a number of 

 smaller parasitic worms. These have not yet been identified. 



LITERATURE 

 Allen, G. M. 



1923. The black flnless porpoise, Meomeris, Bull. Miis. Comp. Zool., vol. 65, 

 No. 7, pp. 233-256. 

 Beddard, F. E. 



1900. A Book of Whales. London, pp. 1-320. 

 Carte, A., and McAlisteb, A. 



1869. On the anatomy of Balaenoptera rostrata, Philos. Trans. Roy. Soc. 

 London, vol. 158, p. 201. 

 Flower, W. H. 



1876. An introtluctioii to the osteology of the Mammalia. London, pp. 

 1-344. 

 KiatNAN, J. D., and Schulte, H. von W. 



1918. Memoranda upon the anatomy of the respiratory tract, foregut, and 

 thoracic viscera of a foetal Kogia breviceps, Bull. Amer. Mus. 

 Nat. Hist., vol. 38, art. 8, pp. 231-267. 



KiJKENTHAL, W. 



1889-93. Vergleichend-anatomische und entwickelungsgeschichtliche unter- 



suchungen an walthieren, Denkschr. Med.-nat. gesellsch. Jena. 



vol. 3, pp. 1-448. 

 1890. Ueber reste eines hautpanzers bei zahnwalen. Anat. Anz., vol. 5, 



pp. 237-240. 

 Lydekker, R. 



1909. On an Indian dolphin and porpoise, Proc. Zool. Soc. London, pp. 



802-808. 



