BY C. W. DE VIS. 105 



Molars smooth, with rectiUnear crests, feeble links and sharp 

 angles; upper molars without distinct anterior links, lower 

 seldom without posterior talons. Premolars about as long as the 

 lower last molar. Upper j^remolar with a long transversely 

 ribbed ledge; lower without intero-posterior cusp. 



Dimensions. 



Mandibular. — In adults : The length of the full series of cheek- 

 teeth ranges from 60-2 to 82-3 (34); of the first four from 48*2 to 

 60-0 (16); of the first three from 32-1 to 41-2 (10); of the first 

 tw^o from 22-2 to 27'4 (7); of the premolar from 14-0 to 18-2 (74); 

 of the last four molars from 48*2 to 56-0 (11); of the last three 

 from 40-3 to 53-0 (16); of the last two from 26-5 to 33-7 (19); of 

 m.* from 14-5 to 19-0 (9); of m.^, m.", m.*^ from 37-0 to 45-6 (7); 

 of m.i, m.- from 21-5 to 28-6 (16); of m.-. m.^ from 25-4 to 31-0 

 (14); of m.i from 9-2 to 13-3 (9); of m.- from 12-5 to 18-3 (11); 

 of m.-5 from 12'2 to 15-0 (5). 



In young : The length of p.-^, mp.*, m.^, m.^, m.'^ is from 54 1 

 to 62-2 (3); of p.^ mp.S m.^, m.^ from 42-0 to 51-0 (7); of p."', 

 mp.S m.i from 284 to 32-8 (5); of p.^, mp.* from 18-0 to 20-9 

 (7); of p.« from 8-5 to 11-2 (23); of mp.S m.^, m.-, m."^ 57-8 (1); 

 of mp.*, m.^, m.- from 33*6 to 35-2 (4); of mp.^, m.^ from 200 

 to 23-5 (10); of mp.^ 10-2 (1). 



The width of m.^ in adults is from 10-0 to 13-6 (118). The 

 anterior depth of the mandible is from 22*0 to 45-0 (82); of the 

 posterior from 18-0 to 40-4 (72); the thickness from 13-6 to 23*5 

 (89); the external length is from 100*0 to 155 0(13); the internal 

 from 67-5 to 113-5 (11); the symphysis from 32-5 to 57*0 (15); 

 the diastema from 31 1 to 57*0 (15). 



Maxillary. — In adults: The length--of the entire series of cheek- 

 teeth is from 65-1 to 85-5 (17); of the first four 66-5 (1); of the 

 first three from 38-5 to 45-5; of the first two from 24-6 to 27-1 (3); 

 of the premolar from 14-4 to 20-4 (33); of the last four molars 

 from 50-5 to 67*5 (8); of the last three from 40-0 to 51-5 (12): of 

 the last two from 30-1 to 37 '0 (9); of the first three true molars 



