PIGS. 
79 
domesticated, and ranging from North Africa, through 
Arabia, Persia, and Central Asia, to India. The two-humped 
C. bactrianus ( 1326 ) exists in a wild state in the deserts of 
Central Asia. 
The second genus of the Tylopoda is Lama, containing two [Case 65.] 
species — the Guanaco, L. Imanacus ( 1328 ), which is the wild 
form of the domesticated Llama and Alpaca, and the much 
smaller Vicuna, L. vicugna ( 1327 ). They are natives of the 
Andes and some of the adjoining plains of South America, the 
domesticated breeds being used as beasts of burden in the same 
[Cases 
66 & 68 .] 
way as the Camels. 
The Tragulina, or Chevrotains (case 64*), are a group of [Case 64*] 
small deer-like animals of about the size of rabbits. Their feet 
are more like those of pigs, and their stomachs have three, 
instead of four divisions. There are two genera in the group, 
namely, Tragulus ( 1331 ), with five or six beautiful little species, 
ranging from India to Borneo ; and Doi^catlierium, with but 
one living representative, the Water-Chevrotain, ]). aquaticum 
( 1334 ), of Equatorial Africa. 
In case 68 are placed a few remains of the extinct families 
Anthracotlieriidce and Oreodontidce, groups which serve in some 
degree to connect the preceding sections of Artiodactyla with 
the Suina, especially as regards their teeth. In the modern 
Suina the teeth of the cheek-series never show the semicylin- 
(Irical columns on their grinding-surfaces characteristic of those 
of the Pecora, Tylopoda, and Tragulina. Their feet also are of 
a less specialized type, four toes are present, and there are 
never cannon-bones in both limbs. The group now includes 
three families IlippopotamuLv, Siiida’, and J?icotjlida\ 
Of the Hippopotamida’, which were once extremely numerous 
in this country, in Southern Europe, and India, only two species 
survive, viz. the common Hippopotamus ampJiihius ( 1340 ), 
too well known to require further notice, of which a stuffed 
specimen is exhibited in case 66* ; and the much smaller 
Liberian Hip)popotamus {Choeropsis) liheriensis ( 1341 ), which 
does not exceed a Wild Boar in size, and occurs only in a few 
localities in West Africa. 
The Pigs, or Suidce (cases 67 and 68), are distinguished by 
their long snouts, flattened in front, small eyes, four-toed feet, 
[Cases 
67 & 68.] 
[ Cases 
66 & 68 .] 
