MAMMALS OF LIBERIA 607 
about 370. This species is terrestrial, and lives in large holes. Biittikofer re- 
garded it as rare, and says that only driver ants and termites were found in the 
stomach of one from Cape Mount, while that of a second, from Little Bassa, con- 
tained nothing but a ball of grass as big as one’s fist, according to Stampfli, the 
collector. 
ARTIODACTYLA Even-toed Hoofed Mammals 
SUIDAE Pigs 
Koiropotamus porcus (Linné). Red River Pig 
Sus porcus Linné, Syst. Nat., ed. 10, vol. 1, p. 50, 1758: Africa, Guinea. 
A reddish orange color, with a white line down the back; forehead blackish; ears with a long 
tuft of hair. West Africa. 
Although apparently of general distribution, this pig is seldom seen. Biitti- 
kofer secured three specimens on the Junk, the Du, and the Cess rivers, and 
says that they may lie half the day in a wallow in the mud and not be noticed. 
Or the sow with her eight to twelve young may lie in a place scooped out in a 
grassy field, with noses to the center, sleeping while the boar keeps watch. They 
feed on roots, fruits, and palm nuts. A native hunter, Taylor, assured us that 
in June and July this pig builds a sort of nest, a pile of brush three or four feet 
thick with a little clearing all around it, and crawls in under it to bring forth her 
ten to twelve young. One such nest he showed to one of us, and pointed out a 
long vine that stretched under the nest and across the opening around it, useful, 
he said, as a means of warning the pig of danger in case the vine is stepped on. 
He claimed that he had startled the old pig in that way more than once. Ac- 
cording to this same informant, there are two sorts of wild pigs, red and black, 
the latter much more dangerous to hunt. They do not see very well, and are 
hunted by tracking them and coming on them as they feed. Johnston has sug- 
gested the possibility of the Forest Pig (Hylochoerus) occurring in Liberia, but 
no specimens seem to have been taken. Whether the black pigs so often reported 
may be of this type remains to be proved. 
Choeropsis liberiensis (Morton). Pygmy Hippopotamus 
Hippopotamus liberiensis Morton, Journ. Acad. Nat. Sci., Philadelphia, ser. 2, vol. 1, p. 232, 
1849: St. Paul’s River, Liberia. 
The Pygmy Hippopotamus is a smaller edition of the more familiar species of the East and 
South African rivers, but has usually only one pair of incisors in the lower jaw, and the feet have 
the toes slightly more separate and spreading. In addition the proportions of the head are quite 
different. 
It is remarkable that this species should be confined to the rivers and forests 
of Liberia and the adjacent borders of Sierra Leone, whence a number of speci- 
mens have been secured from time to time. The British Museum has a skin and 
skull from Moa Valley, Daru, Sierra Leone, and a second from the Liberian 
border of that country. Liberian specimens have been on exhibition at the 
Zoological Gardens, London, in 1913, and we saw two there in 1926. We were 
