BY C. W. DE VIS. 
99 
Examp I es — -ji ve. 
Mandibular. — A left ramus with all the cheek-teeth in place; 
incumbent folds on m. 4 distinct, on the other teeth almost 
obliterated by old age (10607); vascular foramen large — A left 
ramus with all the cheek-teeth (10726); distinct relics of the folds 
on the posterior molars; vascular orifice large; aging — A right 
ramus with the first three molars, sockets of p. 4 and m. 4 ; folds 
distinct on all the teeth (8831); vascular orifice large; adolescent 
— A left ramus with all the cheek-teeth but the last; the rising 
premolar exposed (10233); vascular orifice moderate; young — A 
fragment of a left ramus with the anterior portion of the milk 
premolar. 
Key to fossil IIal/)iaturi. 
Width of m. 3 7*6 and upwards. 
P. 4 with a large intero-posterior dilatation; lobes 
with folds vinceus 
P. 4 with no large intero-posterior dilatation 
Crown of j:>. 4 with an anterior lobe partially 
divided off thor 
Crown of p. 4 without anterior lobe partially 
divided off 
Size larger; length of m. 1 , m. 2 , m. 3 32*0 or up- 
wards anak 
Size smaller; length of m. 1 , m. 2 , m. 3 23*5 
Intero-anterior surfaces of lobes smooth dryas 
Intero-anterior surfaces of lobes with ac- 
cessory processes . . odin 
Width of m. 3 6*5 or less. 
P. 4 with a large intero-posterior cusp; crests of 
molars straight indra 
P. 4 with a smaller intero-posterior cusp; fore 
valley of anterior molars with an accessory 
link siva 
