RHINOCEROS TICHORHINUS. 349 
plymg the secreting organ of the thick hoof which once 
adhered to it: the under figure shows the smooth articular 
surface which played upon that of the second phalangeal 
bone. 
Of the bones of the hind extremity Dr. Buckland’s 
collection at Oxford contains a rich series, from which, 
indeed, Cuvier derived much of his knowledge of the ana- 
tomical distinctions of this part of the skeleton of the 
Rhinoceros tichorhinus. We figures a fine specimen of 
the os innominatum, or haunch-bone, (tom. cit. pl. xiv. figs. 
1 and 2,) which, compared with that bone in the existing 
one-horned and two-horned Rhinoceros, exhibits a narrower 
” 
and longer ‘‘foramen ovale:” the lateral borders of the 
iliac bones are more oblique and more concave towards the 
neck ; the anterior border is less convex, especially towards 
the external angle; and this angle is narrower, more 
pointed, and not forked; the external angle of the 
tuberosity of the ischium is also more pointed. The 
femur or thigh-bone of the Rhinoceros may be distin- 
guished from that of the Hippopotamus, Aurochs, and 
other large herbivorous quadrupeds of similar size, by a 
flattened process extending outwards from near the middle 
of the outer part of the shaft: this process is termed the 
‘¢ third trochanter.” The shaft is broad and flat, especially 
at the upper end. I have compared the proximal part of 
the thigh-bone of the young Rhinoceros from Oreston, 
in which the hemispherical articular head and the great 
trochanter were in the state of detached epiphyses, with 
the femur of a young Rhinoceros indicus in the same state, 
and found the depression for the lgamentum teres 
shallower in the fossil: the post trochanterian depression is 
also shallower, and the third trochanter smaller. The shaft 
is thicker in proportion to the lower condyloid expansion 
