9. PSBUBOCHIRUS. 



169 



1. Ps. lemuroides, p. 170 



II. Cranial Chaeacters. 



A. Molarsi-3 more than 10-5 millim. 



a. Nasals reaching forwards only to about 

 the level of i? 

 o^. Canine about as long as i.^ * Ms.i-3 



about 12 millim 



6. Nasals reaching to about the level of i.' 

 V-. Dental series interrupted, with 

 marked diastemata in the pre- 

 molar region, i." not, or little, 

 longer,horizontaUy than i.' Upper 

 edge of lower i.' straight or convex. 

 a'. Nasals vaulted, very convex along 

 the centre. Diastema between i.^ 

 and canine more than 3 millim. 



Ms.i-3 11 to 11-5 millim 



6*. Nasals flat above, not vaulted. 



Diastema between i.' and canine 



less than 3 millim. 



a". Supraorbital edges sharp, not 



inflated. Ms.i-3 11-2 to 12-6 



milUm 



6'. Supraorbital edge's rounded, in- 

 flated, 

 n''. Nasal notch shallow, nasals 

 projecting less than 7 mil- 

 lim. beyond their junction 

 with the premaxillEB. Ms.i-3 



12-6 to 13-2 millim 



J*. Nasal notch very deep, na- 

 sals projecting more than 7 

 millim. beyond their junc- 

 tion with the premaxillse. 



Ms. 1-3 13 to 14 millim 



c'. Dental series nearly or quite con- 

 tinuous; i.^ elongated horizontally, 

 its antero-posterior diameter twice 

 that of i.' Upper edge of lower i.^ 

 concave. 



c^ Molarsi-3 13-6 millim 



cP. Molarsi-s 12-2 to 125 millim. . . 



B. Molarsi-s less than 10-5 millim. 



c. i.' and p.^ present. Canine about as 



long as i.' Bullae i;ounded, swollen, 

 transparent. 

 d}. Molars, large, ms.i-' 10 millim.; p.^ 



touching p.' ; . . . 8. Fs. schlegeK, p. 180. 



e^. Molars small, ms.i-3 less than 9 mil- 

 lim. ; p.' separated from p.' 9. Ps. canescens, p. 181. 



d. i.' and p.^ aborted ; canine minute, much 



shorter than i.^ Bullaj flattened, little 

 swollen, opaque. 

 />. Molars small, ms.i-3 8-8 millim . . 10. Ps.forbesi, p. 183. 



2. Ps. herbertensis, p. 170. 



3. Ps. pei'egrinus, p. 172. 



4. Ps. occidentalis, p. 174. 



5. Ps. cooki, p. 176. 



6. Ps. archeri, p. 177. 



7. Ps. albertisi, p. 178. 



* Canine markedly shorter than i.' Petauroides volans, p. 164. 



