INDIAN TERTIARY AND POST-TERTIARY VERTEBRATA. 
SIWALIK CAMELOPARDALIDAi 
By R. LYDEKKER, B.A., F.Z.S., 
GEOLOGICAL SURVEY OF INDIA. 
[WITH PLATES XVI TO XXII.] 
Order : UNGULATA/Div. ARTIODACTYLA. 
Family: CAMELORARDALIDjE. 
Terms employed in description of molars. — la describing the upper molars of 
ruminant Artiodactyla in this and succeeding parts of the present work, the follow- 
ing terms will be employed, viz. : — 
Anterior lobe— Antero-external column of crown (PI. XYI, fig. 7 — a). 
Posterior „ =Postero „ „ ,, ( ibid c ). 
Anterior cm<?<m£=Antero-internal „ „ ( ibid b). 
Posterior „ =Postero „ „ „ ( ibid d). 
Accessory tubercle= Tubercle between the two crescents. 
Dorsum = External surface of tooth. 
Costoe = Ridges on dorsum. 
Cingulum = Belt surrounding base of crown. 
Enamel pits or islands — Spaces enclosed by folds of enamel between the lobe and crescent 
of each division of the crown. 
Median valley = The space separating the two crescents internally. 
In the lower molars the same terms will be employed, with the exception, that 
from the fact of these teeth being the reverse of the upper ones, the ‘ crescents ’ will 
be on the outer, and the e lobes ’ on the inner sides of the teeth. In the last lower 
tooth of both the deciduous and the permanent series, the additional division will be 
termed the third or accessory column ; this may contain both a £ lobe ’ and a c cres- 
cent,’ or may consist of the latter only. 
Definition of Camelopardalidee. — The family Camelopardali’dce is represented 
at the present day by the single genus Camelopardalis , and that genus only by the 
giraffe or camelopard {Q. girajfa) of Southern Africa. In past geological periods, 
however, the genus was represented by several species, which once inhabited the 
European and Asiatic continents, and fro m which the African form may have taken 
