SIWALIK CAMELOPARDALICLE. 
27—125 
Vertebral column . — In the Siwalik collection of the Indian Museum there are 
several cervical vertebrae of large ruminants of a different form from the one referred 
above to Vishnutherium , and from those of Sivatherium, figured in the. “ Eauna 
Antiqua Sivalensis,” and those described by Dr. Ealconer in the “ Catalogue of 
the Siwalik collection of the Asiatic Society of Bengal.” These specimens were 
all obtained from the western Punjab, and doubtless belong to the present genus. 
Atlas. — The first of these specimens is an atlas vertebra, collected by Mr. 
A. B. Wynne (Indian Museum, No. B. 380). It has much the same proportions, 
hut is of smaller dimensions than the atlas of S 'ivatherium, represented in figure 1 
of plate B of the “ Eauna Antiqua Sivalensis.” 
Axis. — The next specimen is an axis vertebra, collected by Mr. Theobald 
(Indian Museum, No. B., 381). This specimen is nearly as large as the correspond- 
ing vertebra in the same collection described by Dr. Ealconer 1 , hut has very different 
proportions, as is shown by the following measurements : — 
Hydaspitherium. 
Sivatherium. 
Width of articulating surface for atlas . . . . 
5'5 
56 
Length of lamina of neural arch ........ 
3-8 
26 
Interval between anterior aperture of neural canal and hind border of 
post-zygapophysis .......... 
63 
4-4 
The posterior extremity of the ‘ centrum’ of the vertebra of Hydaspitherium 
has been broken, away, so that the length of this part cannot be compared in the 
two specimens. • The dimensions given above, however, clearly show that the verte- 
bra in question is of a more elongated type than that of Sivatherium. 
Fifth cervical. — A specimen of a fifth cervical, collected by Mr. Theobald 
(Indian Museum, No. B. 285), is relatively longer and narrower than the correspond- 
ing vertebra of Sivatherium , of which a specimen is described by Dr. Ealconer 2 , 
and the condyle is proportionately longer and narrower. 
The following are the dimensions of the two specimens : — 
Hydaspitherium. 
Sivatherium. 
Length of inferior surface to condyle ....... 
3-8 
3-4 
Width between inferior lamellae of transverse processes 
2*3 
35 
Vertical diameter of condyle ......... 
35 
2-92 
Transverse „ „ ......... 
2-72 
2-3 
1 “ Pal. Mem.,” Vol. I, p. 273. Ind. Mus., No. B. 376. An imperfect specimen is figured in “F. A. S.” 
pi. B., fig. 3. 
2 “ Pal. Mem.,” Vol. I, p. 276, No. 338. 
