MUKID.K. — DASYPBOCTA. 195 



DOLICHOTIS. 



Teeth :- Incisors ~ ; Molars — ; = 2n. 



1-1 ' 4-4 



The Mara. Dolichotis patachonicus. 



Waterhome, Nat, Hist. Mamm. ii. p. 161. pi. 4. fig. 1 (skull).— Owen, 

 Odont. figs. 2, 8 (dentition): Odontology, Art. in Encyel. Brit, 

 p. 453. fig. 88 (section of skull). 

 Cavia patagonica, lilainv., Osteog. G. Cavia, pi. 2 (skull). 



Cervical vertebra) 7 



Dorsal 12 



Lumbar 7 



Sacral 4 



Caudal 15 



*«. Skull and imperfect skeleton. S. America. Presented by the 



Karl of Derby. 

 *6. Skull: voung. Chili. From Mr. Bridges' Collection. 

 c. Skeleton. Chili. Purchased of Mr. Brandt. 



DASYPROCTA. 



Teeth : — Incisors j-f^ ; Molars ~ ; =20. 



The Agouti. Dasyprocta aguti. 



Waterhouse, Nat. Hist. Mamm. ii. pp. .375, .'578 (skull), 1848. — Pander 

 und If Alton, Vergl. Osteol. no. (5. pi. 1 (skeleton). — Cuv., Oss. Foss. 

 v. pi. 1. fig. 10 (teeth).— Owen, Odont. pi. 105. fig. 14 (teeth).— 

 Blainr., Osteog. G. Cavia, pi. 2 (parts of skeleton), pi. 4 (skull, &c). 

 — Brandt, Mem. Acad. St. Petersb. vii. pi. 10. figs. 1-8 (skull). 



Agouti, Buff., Hist. Nat. viii. p. 390. pi. 54 (skeleton). 



Cervical vertebra? 7 



Dorsal 13 



Lumbar G 



Sacral 4 



Caudal 11 



<(. Skeleton. — The specimen described by Mr. Watcrhouse. 

 *b. d, e. Skulls. 

 6, Skeleton. 



Dasyprocta pryixuiolopha. 



a. Skull. — The specimen described by Mr. Waterhouse in Nat. Hist. 



Mamm. ii. p. 381, 1848. 

 h. Skull. 



Azw;\\ Agouti. Dasyprocta azarae. 



a e. Skulls. Bolivia. From Mr. Bridges' Collection. 

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



o 2 



