MUKID.K. ARVICOLA. 1/ i 



CTENODACTYLUS. 



Teeth : — Incisors ~ ; Molars tjj ; = 1 6, 



The Gundi. Ctenodactylus massonii. 



Schreb., Saugth. iv. pi. 239. fig. 12 (dentition).— Brandt, Mem. Acad. 

 St. P^tersb. vii. pi. 8. figs. 1-8 (skull). 



Cervical vertebroe 7 



Dorsal 12 



Lumbar 7 



Sacral 3 



Caudal 11 or 12 



a. Skull. Mount Matamata. From Mr. Fraser's Collection. 



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



c. Skeleton. Algiers. Purchased of M. Parzudaki. 



ARVICOLA. 



Teeth :— Incisors |=j ; Molars j£j ; = 16. 



The Water Rat. Arvicola ainphibius. 



Cuv., Oss. Foss. v. (teeth). — Owen, Odont. pi. 105. fig. 12 (teeth). — 

 Blasius, Faun. Wirb. Deutschl. p. 344. figs. 183-189 (dentition).— 

 Brandt, Mem. Acad. St. Petersb. vii. tab. 3. figs. 1-8 (skull). 



Rat d'eau, Buff., Hist. Nat. vii. p. 348. pi. 43 (skeleton). 



Cervical vertebrae 7 



Dorsal 13 



Lumbar 6 



Sacral 3 



Caudal 23 



*o. Skull. Altai Mountains. 



b-d. Skulls. 



e, f. Skulls. Stockholm. Presented by Professor Sunde vail. 



(/. Skull. From the Zoological Society's Collection. 



h-Tc. Skulls. S. Germany. From Dr. A. Giinther's Collection. 



1. Skull. Italy. — Arvicola terrestris. 



m. Skull. Pyrenees. — Arvicola monticola, De Selys. 



n. Skull. — Arvicola destructor, Savi. 



o. Skeleton. England. From Mr. E. Gerrard's, Jun., Collection. 



Arvicola savii. 



Blasius, Faun. Wirb. Deutschl. p. 394. figs. 220, 221 (dentition). 

 Var. b. Arvicola incertus, De Selys, Rev. et Mag. de Zool. 1854, vi. 



p. 300. pi. 11. fig. 1 a, b (skull* and teeth).— Blasius, Faun. Wirb. 



Deutschl. p. 394. fig. 222 (dentition), 1857. 



*«. Skull. Milan. 



