190 
27th keport, bureau of animal industry. 
of these portions of the limbs. Moreover, in some members of the family 
(although in none of those described here) even the lateral hoofs themselves 
have disappeared and the main hoofs alone remain. 
The geological position of the Bovidee is shown in figure 8. 
THE GENUS BOS AND ITS FIVE SUBGENERA OR GROUPS. 
The genus Bos is the most specialized division of the family Bo- 
vidse, as is shown by the structure of the teeth and by its late appear- 
ance, geologically speaking. Lydekker has enlarged the genus so 
that it includes the species formerly known under the genera of 
ERA. 
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Fig. 8. — Diagram showing geological position of the BovidJB. 
Bos, Bibos, Leptohos, AmpMhos, Bison, Buhalus, Prohubalus, and 
Bujfelus. He makes five subgenera, however, which correspond 
closely to the genera of the older classification. The five subgenera 
or groups he designates as (1) Taurine, which includes our common 
oxen and the humped cattle of Africa and Asia; (2) Bibovine, com- 
posed of the gaur, gayal, and banting; (3) Leptobovine (extinct 
species only); (4) Bisontine, which includes the yak and bisons; 
and (5) Bubaline, or buffalo group. 
The size of the wild species that are members of the genus Bos 
range from that of the anoa, which is only 3 feet 3 inches in height 
