BY C. W. DE VIS. 
105 
Molars smooth, with rectilinear 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 premolar 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 
two 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 260 to 33 7 (19); of 
m. 4 from 14*5 to 19-0 (9); of m. 1 , m. 2 , m. 8 from 370 to 450 (7); 
of m. 1 , m. 2 from 21-5 to 280 (16); of m. 2 . m. 3 from 254 to 310 
(14); of m. 1 from 9-2 to 130 (9); of m. 2 from 120 to 180 (11); 
of m. 3 from 12 2 to 150 (5). 
In young : The length of p. 3 , mp. 4 , m. 1 , m. 2 , m. 3 is from 54'1 
to 62-2 (3); of p. 3 , mp. 4 , m. 1 , m. 2 from 420 to 510 (7); of p. ;) , 
mp. 4 , m. 1 from 284 to 32-8 (5); of p. 3 , mp. 4 from 180 to 20O 
(7); of p. 3 from SO to 11-2 (23); of mp. 4 , m.Vn. 2 , m. 3 57'8 (1); 
of mp. 4 , m. 1 , m. 2 from 330 to 35 - 2 (4); of mp. 4 , m. 1 from 20 O 
to 23-5 (10); of mp. 4 10-2 (1). 
The width of m. y in adults is from 10O to 130 (118). The 
anterior depth of the mandible is from 220 to 450 (82); of the 
posterior from 180 to 404 (72); the thickness from 130 to 23-5 
(89); the external length is from lOOOto 155 0(13); the internal 
from 67-5 to 113-5 (11); the symphysis from 32-5 to 570 (15); 
the diastema from 314 to 570 (15). 
Maxillary. — In adults: The length of the entire series of cheek- 
teeth is from 654 to 85*5 (17); of the first four 660 (1); of the 
first three from 380 to 45-5; of the first two from 240 to 274 (3); 
of the premolar from 144 to 204 (33); of the last four molars 
from 50O to 670 (8); of the last three from 40O to 510 (12); of 
the last two from 304 to 370 (9); of the first three true molars 
