608 REPORT OF THE HARVARD AFRICAN EXPEDITION 
unsuccessful in our efforts to come upon this species, though on one occasion a 
young one was startled on the bank of the Du, and was said to have plunged into 
the stream. Shortly before our visit, the launch of the Firestone Company was 
said to have been attacked by a hippo while proceeding up the stream. The 
animal came up under the bow but did no harm, though nearly oversetting the 
boat. Apparently the first living specimens to reach this country, were a pair 
secured by Hans Schomburgk for Hagenbeck, in 1911-12 and purchased by the 
New York Zodlogical Society; and in the spring of 1927 the capture of a young 
one and the shooting of the mother were reported on the Du. The young one 
was sent to the Zoological Park at Washington. Both Biittikofer and Schom- 
burgk agree that it is less a frequenter of the riverways than of the forest and 
swamps. It is solitary, but may be taken in pitfalls made along the forest trails. 
Biittikofer’s specimens were from Buluma, Hill Town, and Jeh on the Du River, 
while another was seen on the St. John’s River. According to Hornaday, the 
adult male secured for the New York Zodélogical Society stood thirty inches high 
at the shoulders and weighed four hundred nineteen pounds. Jentink points 
out the variation in the number of lower incisors in the skulls secured by 
Biittikofer: there were three on each side in one, two on one side and one on the 
other in a second, and three on one side and one on the other in a third. Ref- 
erence may be made here to various accounts of the structure of the Pygmy 
Hippo, including the original articles by Morton (1844, 1849), the study of the 
skeleton by Milne-Edwards (1868-1874), notes by Chapman (1893), as well as to 
Hornaday’s (1912) note on the pair in the New York Zodélogical Gardens and 
Schomburgk’s (1912) account of their capture, while Pocock’s (1913) article on 
the one in the London Zoological Gardens gives additional valuable details and 
suggests the former wide range of the Pygmy Hippos, since the superficial 
deposits in the island of Madagascar contain skulls of this type. 
TRAGULIDAE Chevrotains 
Dorcatherium aquaticum aquaticum (Ogilby). Water Deer; Chevrotain 
Moschus aquaticus Ogilby, Proce. Zool. Soc. London, 1840, p. 35: Sierra Leone. 
Small, standing about 12 inches at the shoulder, the males with enlarged upper canines; ground 
color rich dark brown mixed with black, above; two broad white lines on sides of throat, the upper 
one nearly continuous with a lengthwise stripe from neck to rump along the sides, with an indistinct 
one below it on trunk, and a line of white spots above it beginning at shoulders; about five trans- 
verse rows of white spots on back; chest white. Gambia to Congo. 
The chevrotains retain a complete metapodial for each of the small lateral 
toes of the feet, and there is a curious callosity at the heel. This species is well 
known to the Liberians, but we saw nothing of it. Bittikofer says it is common 
on the Junk, Du, and Farmington rivers, whence he secured specimens as well 
as at Bendo, but he was unable to obtain it at Robertport, though the natives 
were well acquainted with it there. More recently, however, a body skin was 
secured at Mt. Barclay by R. H. Bunting for the British Museum. Johnston 
has given a good account of its appearance, and publishes a photograph of a 
living one sent to the Zoological Society’s Gardens at London, from central 
