BY C. W. DE VIS. 
9:* 
adult— A right maxilla with jugal process and teeth p. 8 , mp. 4 , 
m. 1 , m. 2 ; p. 4 (extracted); palatal vacuity commencing at mp. 4 
(11120); young. 
Sthenurus otuel, Owen. 
Frocoptodon otuel, Owen, I. 1874, p. 784; Lydekker, IV. p. 236. 
Procoptodon ptisio, Owen, partim; Owen, II. p. 455. 
Pachysiagon otuel, Owen, I. 1874, p. 784. 
Lower molars with numerous attenuated ridges on the posterior 
surface; otherwise not differing from those of S % yoliah in structure, 
but inferior in size. Lower premolar elongate-ovate with one or 
two oblique folds within the cleft. 
Dime?isions. 
Mandibular. — The length of the full series of cheek-teeth varies 
from 65*5 to 76 - 0 (5); m. 2 , m. 3 , m. 4 measure 51-0 (bis); m. 1 , m. 2 
34-2; mp. 4 134. The premolar is from 9-3 to 9'9 (2). The 
width of m. 3 ranges from 12'0 to 14*4. The anterior depth of the 
mandible is from 38-5 to 41-5 (2); its thickness from 28-6 to 32-5 
(5). The diastema is 36*6 (1), the symphysis 65'6 (1). 
The differences between the mean dimensions in this species 
and S. goliah afford in themselves no good reason for keeping 
them apart; they are all easily paralleled in modern species; but 
the difference between the greatest width of the teeth in S. yoliah 
and the least in S. otuel is much greater than in any recent 
Macropod, and on this dimensional ground the present species 
would safely rest were the structural modifications exhibited by 
it less weighty than they are. 
F orm. 
Mandibular. — In the molars the longitudinal links and vertical 
processes subsidiary to them do not specifically differ in number 
or disposition from those of S. goliah; the slender ridges wrinkling 
the hinder surfaces sometimes tend to fuse towards the middle of 
the base into a short rib. 
