222 MURIDjE. GEOMYS. 



' , n, -J J' I From the Zoological Society's Collection. 



g. Skull (very large). India? Presented by T. E. J. Boileau, Esq. 

 h. Skeleton. Cape of Good Hope. 



*i. Sknll : young. Cape of Good Hope. Collected during the voyage 

 of H.M.S. Rattlesnake. 



GEORYCHUS. 



Teeth :— Incisors *f± : Molars ±* ;= 20. 



1-1 ' 4-4 



The Silky Ground Rat. Georychus holosericeus. 

 *«. Skull. S. Africa. 



Georychus damarensis. 

 *a. Teeth. 



The Blind Sand Mole. Georychus csecutiens. 



Bathyergus csecutiens, Peters, Natnrw. Reise nach Mossanibique, 

 Saugth. i. pi. 35. fig. 3 (skull). 



*a. Skull. Port Natal. From Mr. Warwick's Collection. 



Georychus capensis. 



Brandt, Mem. Acad. St, Petersb. vii. pi. 5a. figs. 13-19 (skull). 

 Bathyergns capensis, Waterhouse, Ann. & Mag. Nat. Hist. viii. p. 84. 

 pi. 2. fig. 2 (skull), 1842. 



a. Skull. From the Zoological Society's Collection. 



b. Skull : young. From Mr. Stevens's sale. 



HELIOPHOBIUS. 



Heliophobius argenteo-cinereus 



v. Reise r 

 i), pi. 35. i 



Peters, Natunv. Reise nacb Mossambique, Saugth. i. p. 140. pi. 32. 

 fig. 5 (brain), pi. 35. fig. 2 (skull). 



GEOMYS. 



Teeth :— Incisors ^ ; Molars — ;=20. 



I— 1 4-4 



The Columbian Sand Rat. Geomys douglasii. 

 Richards., Faun. Bor.-Amer. p. 200. pi. 18 c. figs. 1-6 (skull), 1829. 



The Pecos Gopher. Geomys clarkii. 



Baird, Maram. N. America, p. 383. pi. 50. fig. 1 (skull), pi. 83. fig. 1 

 (skull), 1859. 



