196 MUKID.TJ. HYDROCHXERTJS. 



Tlie Chested Agtjti. Dasyprocta cristata. 



*a. Skull. S. America. Purchased of Mr. Bartlett. 



b, c. Skulls. From the Zoological Society's Collection. 



The Acouchy or Olive Agouti. Dasyprocta acouchy. 



*rt. Skull, and bones of the body. — The specimen described by Mr. 



Waterhouse in Nat. Hist. Manim. ii. p. 394. col. 1. 

 l>, c. Skulls. From the Zoological Society's Collection. 



C(ELOGENYS. 



Teeth :— Incisors jfj ; Molars g ; = 20. 



The Paca. Coelogenys paca. 



Waterhouse, Nat. Hist. Manim. ii. p. 864. pi. 18. fig. 8 (skull). 

 Coelogenys ftilvus, F. Cur., Ann. du Mus. x. p. 206. pi. 9. figs. 1 & 2 



(skull). 

 Coelogenys subniger, F. Ouv., Ann. du Mvis. x. p. 206. pi. 9. figs. 3 & 4. 

 Coelogenys fusca, Owen, Odont. pi. 105. fig. 15 (teeth). — Cuv., Oss. 



Foss. v. pi. 1 (teeth). 

 Cavia paca, Blainv., Osteog. G. Cavia, pi. 2 (skeleton, cf), pb 4 (skull, 



from Guiana and Columbia). 

 Paca, Buff., Hist. Nat. Supp. iii. p. 278. pi. 44 (skeleton). 



Cervical vertebra) 7 



Dorsal 13 



Lumbar 6 



Sacral 4 



Caudal 5 (imperfect). 



a. Skull. Trinidad. Presented by J. Wright, Esq. 



b, c. Skulls. S. America. 



*d. Skull : young. S. America. 



e. Skeleton. S. America. From Mr. Brandt's Collection. 

 /. Skeleton. S. America. From Mr. Stevens's sale-rooms. 

 (/. Skull. S. America. From Mr. Argent's Collection. 



•'en i i. i- S. America From the Zoological Societv's Collection. 

 j. Skeleton. J J 



HYDE0CH(EEUS. 



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



1-1 4-4 ' 



The Captbaea. Hydrochcerus capybara. 



Pander unci D' Alton, Vergl. Osteol. no. 6. pi. 1 (skeleton), pi. 8 a, b, c 

 (skull), 1821.— Cm, Oss. Foss. v. (dentition), 1823.— F. Cuv., Dents 

 des Mamm. p. 148. no. 46 (dentition), 1825. — Owen, Odont. pi. 105. 

 fig. 17 (dentition), 1840-45. — Waterhouse, Nat. Hist. Mamm. ii. 

 pi. 4. fig. 3 (skull), 1848.— Brandt, Mem. Acad. St. Pe"tersb. vii. 

 pi. 10. fig. 9 (lower jaw). 



