CHAP. Ill] THE MAMMALIAN ORDER PRIMATES 



45 



Fig. 17. General external appearance of a Lemur. (Adapted from Mitchell, 

 Childhood of Animals.) 



Paneto- sphenoid 

 articulation 



Ethmoid bone 



Lachrymal bone 



Auditory 

 bulla 



Canimf orm. 



premolar 



tooth 



ncisi form, 

 canine tooth 



Fig. 18. Cranium, with mandible, of Lemur varius; note the auditory bulla, 

 the articulation of parietal and alisphenoid bones, the facial extension of the lachry- 

 mal bone (cf. Fig. 21), the articulation of the frontal bone and maxilla behind the 

 lachrymal bone, the small forward projection of the orbital plate of the ethmoid 

 bone, the number of teeth, the small size of the upper and the great projection of 

 the lower incisor teeth. In the mandible, the canine-like tooth is a pre-molar by 

 position, and the canine tooth is incisiform. 



