BY C. W. DE VIS. Ill 



anteriorly, parallel with outer side and not incurved posteriorly. 

 A largely dilated intero-posterior cusp linked to the lobe apically, 

 separated from it by a wide cleft posteriori}^ Ledge very narrow 

 within a broadly tubercular basal rim which extends to the 

 anterior fifth. Mesial two-thirds of the outer side impressed, 

 with three strong short ribs, decreasing in length rearwards. 



Mnlars. — (PI. XVII. figs. 14-15). Mandibulary, with a narrow 

 basal ridge posteriorly; hind lobe of m. ^ distinctly the narrower. 



Examples— seventy -three. 

 MaxiUary. — Four adults. 

 Mandibular. — Fifty-six adults, thirteen young. 



Halmaturus odix, n.s. 



Lower premolar unilobate, mesially corrugated, expanded but 

 not developing a cusp on intero-posterior angle. Molars with an 

 accessory process in relief on intero-anterior surface of lobes and 

 with basal talons. Lower contour line undulated. 



Dimensio7is. 



Mavdihular. — The full series of cheek-teeth measures 46*7 in 

 length (1); the first four 37*0 (1); the first two true molars 18-6 

 (1); the last molar 12-4 (1); the premolar from 8-0 to 8-7 (3); 

 m.- 10-8 (1). The width of m.^ 7-6 and 8-1 (2). The anterior 

 depth is from 192 to 24-1 (3); the posterior from 16'1 to 23*8 

 (3); the thickness from 11 to 12-5 (3). 



Form. 



Mandibidar. — P.* (PL xvii. fig. 16) elongate; diameters 8-0 x 

 4-0, gradually widening from the pointed fore end. Crest central; 

 anterior and posterior cusps defined by a mesial compression of 

 the crown, which has on each side three distinct and tv»-o obscure 

 short ribs. Crest curving on to a small but distinct dilatation of 

 the crown over the intero-posterior angle. Profile of fore end of 

 crown gibbous. 



