220 Dr. J. E. Gray on the S hills of Hares 



Suborder II. DUPLICIDENTATA, Illiger. 



Cutting-teeth | ; upper with a deep angular central groove ; 

 molars rootless, | • | or | • |. Skull with the two optic foramina 

 united. 



Fam. 1. LsLgomyidiSd^ Lag omys, F. Cuvier. 



Tail none visible ; ears short, rounded ; hind legs short ; 

 toe-pads naked, small. Skull depressed, expanded behind. 

 Maxilla with a large perforation in front of orbit. Grinders g • ^, 

 the upper hinder with a small third lamina on the hinder side; 

 the front grinders shelving backwards. 



1. Ogotoma. Skull : the orbits very large; space between the 

 orbits narrow; nose narrow, bent down. 



Ogotoma Pallasii. [Lagomys ogotoma, Cuvier, Waterh. Glir. 

 17. Lepus ogotoma, Pallas, Glires, 30, t. 3, 4 a. f. \Qa.) B.M, 



2. Lagomys. Skull : the orbits large ; space between the orbits 



broad and flat ; nose broad, shelving, nearly in a line with the 



forehead. 



Asia. 



1. Lagomys alpinus, Cuvier, Waterh. Glir. 15, fig. {Lepus 

 alpinus, Pallas, Glires, 30, t. 2, t. 4 a. f. 13 a, h) . Siberia. B.M . 



2. Lagomys pusillus, Desm., Waterh, Gl. 19. [Lepus pusillus, 

 Pallas, Glires, 30, t. 1, t. 4. f. 4, 9). South Siberia ; Ural. B.M. 



3. Lagomys rufescens. Gray, Ann. & Mag. Nat. Hist. 1842, 

 p. 266 ; Waterh. Gl. 20. Cabul. B.M. 



4. Lagomys Hodgsoni, Blyth, J. A. S. B. 1841, x. 816, t. ; 

 Waterh. Gl. 23. Ladakh. 



5. Lagomys nepalensis, Hodgson, J. A. S. B. 1841, x. 854, 

 t. ; Waterh. Gl. 24. Thibet ? Nepal. B.M. 



6. Lagomys Roylii, Ogilby, Royle, Himal. t. 4; Waterh. Gl. 

 26. Choor Mountains. 



7. Lagomys hyperboreus, Wagner, Waterh. Gl. 36. [Lepus hy- 

 pei'horeus, Pallas.) North-east Siberia. 



America. 



8. Lagomys princeps, Richards. F. B.-A. 227, t. 19; Waterh. 

 Gl. 28 ; Baird, N. A. M. 619; Aud. N. A. Q. t. 83 (skin). Rocky 

 Mountains. B.M. 



9. Lagomys minimus. Lord, P. Z. S. 1863, p. 98. North-west 

 coast of America. B.M. 



Fam. 2. Leporidae, J. Gray (Lilljeb. 59). 



Ears large, elongate, often longer th-an the head. Tail 

 short, bushy; the hind legs much longer than the fore legs. 



