82 MR. E. R. ALSTON ON THE ORDER GLIRES. [Jail. 18, 



9. Nesokia, Gray, Ann. and Mag. Nat. Eist. x. p. 264 . (1842). 

 Muzzle blunt ; ears moderate ; claws long ; fur rather harsh ; tail 



short, scaly, sparsely haired. Palate narrow ; incisive foramina short ; 

 auditory bullae rather small. Incisors broad. First molars with three 

 laminee ; the rest with two only. 



F. Dendromyin^e. Incisors convex in front ; molars tuberculate. 

 Infraorbital opening not narrowed below ; coronoid process very small. 

 Ears hairy. Claws long. Ethiopian. Recent genera : — 



10. Dendromys, A. Smith, S. African Q. Journ. ii. p. 158 (1834). 

 Form slender; tail long, scaly, and sparsely haired. Three middle 



digits of -each foot much longer than the first and fifth. Incisors 

 grooved. Molars parallel in series ; the first as long as the second 

 and third taken together ; their tubercles arranged in pairs. 



11. Steatomys, Peters, Reise n. Mossambique, i. p. 1G2 . (1852). 

 Form plump ; tail rather short, finely scaled and densely haired ; 



claws of fore feet the longest. Incisors grooved. Molars converging 

 behind ; the first longer than the second and third taken together ; 

 their tubercles arranged in twos and threes. 



12. Lophuromys, Peters, Monatsb. Ak. Berlin, 1874, p. 234 



(1874). 

 Form as in Steatomys, but fur developed into fine flattened bristles, 

 pterygoid fossse longer, and coronoid process better-developed. In- 

 cisors plain. Molars nearly parallel in series ; the third upper with 

 only two anterior tubercles. 



G. Cricetin^e. Molars tuberculate. Infraorbital opening sub- 

 typical, not much narrowed below, and the perpendicular plate little 

 developed. Large internal cheek-pouches. Palsearctic and Ethiopian. 

 Recent genera : — 



13. Cricetus, G. Cuvier, Regne Animal (l re ed.),i. p. 198 (1817). 

 Form thickset ; limbs short ; claws large ; tail short, not scaly, 



sparsely haired. Cheek-pouches large. Skull with marked but 

 rounded supraorbital ridges continued into temporal ridges ; coronoid 

 process high and falcate. Incisors plain. Molars with tubercles 

 arranged in pairs, of which the first has three and the rest two only ; 

 these entirely disappear in aged specimens. 



14. Saccostomus, Peters, Monatsb. Ak. Berl. 1846, p. 258 (1846). 

 Form as in Cricetus, but feet and claws weaker and more murine. 



Cheek-pouches moderate. Supraorbital ridges more parallel, and 

 infraorbital opening more typically murine ; incisive foramina longer. 

 Incisors plain. Molars with tubercles arranged in threes, one of each 

 row being smaller than the other two. 



15. Cricetomys, Waterhouse, P. Z. S. 1840, p. 2 ... . (1810). 

 Form more murine ; muzzle pointed ; tail long, scaly, and very 



