BY C. W. DE VIS. 93 



adult — A right maxilla with jugal process and teeth p.-^, mp."^, 

 m. ^, m.'-; p.^ (extracted): palatal vacuity commencing at mp.* 

 (11120); young. 



Sthexurus otuel, Owen. 



rrocoptodon otueJ, Owen, I. 1874, p. 784; Lydekker, IV. p. 236. 

 Procoptodon pusio, Owen, partim; Owen, II. p. 455. 

 Pachysiagon otuel, Owen, I. 1874, ^. 784. 



Lower molars with numerous attenuated ridges on the posterior 

 surface; otherwise not diflfering from those of .S". yoiiah in structure, 

 l)ut inferior in size. Lower premolar elongate-ovate with one or 

 two oblique folds within the cleft. 



DimPMsiouii. 



Mayidihdar. — The length of the full series of cheek-teeth varies 

 from 65-5 to 76*0 (5); m.-, m.'% m.^ measure 51*0 (bis); m.^, m.- 

 34-2; mp.^ 13-4. The premolar is from 9-3 to 9-9 (2). The 

 width of m.-' ranges from 12'0to 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 symplwsis 65*6 (1). 



The differences between the mean dimensions in this species 

 and S. yoiiah 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. goliah 

 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 bv 

 it less weighty than they are. 



Form. 



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. 



