206 MURID-E. PSAMMOMTS. 



The Dux Rat. Gerbillus afer. 



Cervical vertebrae 7 



Dorsal 17 



Lumbar 7 



Sacral 3 



Caudal 21 



a. Skeleton: male. Cape of Good Hope. From M. Verreaux's Col- 

 lection. 



Gerbillus shawii. 



Duvemoy, Mem. de la Soc. d'Hist. Nat. de Strasbourg, ii. pi. 2. 

 figs. 11-13 (skeleton and skulls). 



The Black-tailed Gerbille. Gerbillus melanurus. 



Meriones libvcus, Pander unci D' 'Alton, Vergl. Osteol. no. 6. pi. lie 

 (skeleton),* d (skull). 



a. Skull. Abyssinia. 



Tbe Indian Gerbille. Gerbillus indicus. 



Meriones indicus, Owen, Odont. pi. 105. fig. 8 (dentition). 



Dipus indicus, F. Cm., Dents des Mamm. p. 172. ? no. 62 (dentition). 



— Waterhouse, Charlesworth's Mag. Nat. Hist. 1839, p. 13. tig. d 



(skull ). 



a, />, c. Skulls. India. Presented by Walter Elliott. Esq. 

 d. Skull. Kashmir. Presented by Professor Oldliam. 



Gerbillus campestris. 

 a. Skull. Algiers. From M. Parzudaki's Collection. 



The Kamiesberg Gerbille. Gerbillus auricularis. 



Gerbillus brevicaudatus, Waterhouse, Charlesworth's Mag. Nat. Hist. 

 1839, p. 270. fig. 35 c (skull). 



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



PSAMMOMYS. 

 Teeth :— Incisors |=i; Molars g;=16. 



The Tamarisk Eat. Psanrmcmys tamariscus. 

 *a. Skull. Songaria, Russia, 



The Fare. Psammoniys obesus. 



Riippell, Atlas, tab. 22, 23. a-d (skull and skeleton). — Waterhouse, 

 Nat, Hist. Mamm. p. 13. a, b (skull) ; Charlesworth's Mag. Nat, 



