SUMM.iJn nF Tin: /.\/)l.l.\ MAMMAL .SURVEV. 



)61 



h\ 



liK-ii^ois ill IViiiil ol'tlu' upper 

 and lowtM- jivw, either not two 

 in iiiiinber, or not chisel 

 ijhnped. 



. Anterior and posterior 

 limbs connected by an 

 integumentary expansion 

 forming- a parachute ; in- 

 cisors compressed, multi- 

 cuspidate 

 Anterior and posterior 

 limbs not joined to form 

 a parachute • incisors 

 conical. 

 «'. Snout very pointed ; 

 upper lip projecting far 

 beyond lower ; median 

 pai: of incisors larger 

 than the others 

 h\ Upper lip, not project- 

 ing beyond lower ; 

 median pair smaller 

 than the other incisors. V. 

 Two chisel shaped incisors in 

 front of each jaw ... ... VI. 



h'. Feet either not terminating in 

 distinct toes, or furnished with 

 hoofs, or hoof-shaped nails ... VII. 



l>\ Jaws toothless VIII. 



II. No external jDOsterior limbs ; body modi- 

 fied for swimmino-. 

 o 



A. — Homodont, or toothless ; breathing 

 orifice usually on top of head ; mam- 

 ma3 inguinal IX. 



-B. — Heterodont ; breathing orifice at end 



of snout ; mammto pectoral ... ... X. 



Order I. ruiMATES, 

 There are two Suborders, distinguishable as follows 



Key lo the ISuhordem of the Primates. 



-I. — Orbit completely enclosed by bone 

 behind ; poUex short, or wanting ; 

 second digit of fuot with a nail ; upper 

 incisors not divided by a vacant space 

 iu the middle... ... ... ... /, 



[V. Bermojptera, 



HI. Iiisectivora . 



h\ 



Carnivora . 

 Eodentia. 



Ungulata. 

 Fdentata. 



Cetacea. 

 Sirenia. 



Aathroi)oidea^ 



