190 MURIDJE. HTSTRIX. 



PETROMYS. 



Teeth : — Incisors -^ 



The Eock Mouse. Petromys typicus. 



A. Smith, S. African Quart. Journ. i. p. 146 ; Illustr. Zool. S. Africa, 

 Mamm. pi. 21. fig;. 1 a-e (skull). — Waterhouse, Nat. Hist. Manim. ii. 

 p. 309. pi. 16. fig. 8 (skull).— Schreb., Saugth. iv. pi. 239 d. fig. 11 

 (dentition). 



Cervical vertebrae 7 



Dorsal 12 



Lumbar 7 



Sacral 4 



Caudal 20 (imperfect). 



a. Skull. S. Africa. From the South African Museum. 



b. Skull. 



c. Skeleton. S. Africa. Presented by Sir A. Smith. 



HYSTRIX. 



Teeth :— Incisors £j ; Molars — ; = 20. 



The Porcupine. Hystrix cuvieri. 



Schreb., Saugth. iv. p. 599. pi. 166 (skull), 1792.— F. Cm:, Mem. du 

 Mus. ix. pp. 424, 430. tab. 20 (skull).— Brandt, Mem. de l'Acad. de 

 St. Petersb. 1835, p. 371. tab. 8. figs. 1 & 2 (skull).— Van der Hoeven, 

 Acad. Exp. tab. 19. figs. 1-4 (skull and dentition). — Waterhouse, 

 Nat. Hist. Mamm. ii. p. 448. pi. 20. fig. 1 (skull).— Owen, Odont. 

 fig. 1 (dentition).— Cuv., Oss. Foss. v. p. 19. pi. 1. fig. 9.— Sjrix, 

 Cepkalotr. pis. 7-11. — Pander und I) 'Alton, Vergl. Osteol. pi. 1 

 (skeleton), pi. 8. fig. d (skull), 1823.— Blainv., Osteog. G. Hystrix, 

 pi. 1 (skeleton, d 1 ), pi. 2 (skulls). 



Cervical vertebra? 7 



Dorsal 14 



Lumbar 5 



Sacral 4 



Caudal 11 



«. Skull. From the Zoological Society's Collection.— The specimen 

 described by Dr. Gray in Proc. Zool. Soc. 1847. 



*b. Skull, and bones of the body. Gambia. Presented by the 

 Earl of Derby. — The specimen described bv Mr. Waterhouse in 

 Nat. Hist. Mamm. ii. pi. 20. figs. 1 & 2. 



c. Skull. Tunis. From Mr. Fraser's Collection. 



d. Skull. Portugal. 



*e. Skeleton : very much diseased. } From the Zoological Society's 

 /. Skeleton. J Collection. 



g. Skeleton. 



