MURID.E.—DASYPROCTA, 195 
DOLICHOTIS. 
Teeth :~—Incisors 3 Molars = 520. 
The Mara. Dolichotis patachonicus. 
Waterhouse, Nat. Hist. Mamm. ii. p. 161. pl. 4, fig. 1 (skull).— Owen, 
Odont. figs. 2, 3 (dentition) ;: Contain Art. in Eneyel. Brit. 
p. 453. fig, 88 (section of skull). 
Cavia patagonica, Blainy., Ostéog. G. Cavia, pl. 2 (skull), 
Cervical vertebre.............. 7 
Worsalle = 5c cngevncece ss 3 sre aseaie ate oe 12 
Lumbar ..... 7 
Saal: Waki waa, ea@aeadeces 4 
Caadalassc 5 data eens ao heeds 15 
*a. Skull and imperfect skeleton. S. America. Presented by the 
Karl of Derby. 
*b, Skull: young. Chili. From Mr. Bridges’ Collection. 
ec. Skeleton. Chili. Purchased of Mr. Brandt. 
DASYPROCTA. 
Teeth :—Incisors =; Molars 5 =20. 
The Acovrr. Dasyprocta aguti. 
Waterhouse, Nat. Hist. Mamm. ii. pp. 375, 378 (skull), 1848.— Pander 
und D’ Alton, Vergl. Osteol. no. 6. & 1 (skeleton).— Cuv., Oss. Foss. 
v. pl. 1. fig. 10 (teeth). Owen, Odont. pl. 105. fig. 14 (teeth).— 
Blainv., Ostéog. G. Cavia, pl. 2 (parts of skeleton), pl. 4 (skull, &c.). 
—Brandt, Mém. Acad, St. Pétersb. vii. pl. 10. figs. 1-8 (skull). 
Agouti, Buff, Hist. Nat. viii. p. 390. pl. 54 (skeleton). 
Cervical vertebra. ............ 7 
Dorsal ov5 ea toned shedpeseet ow 13 
Lumbar .......... eeeiekewge 10 
Sacral csuacded. carducctostoes 4 
Catdal sc cccins: iidedaemcant 11 
a. Skeleton.—The specimen described by Mr. Waterhouse. 
*), d, e. Skulls. 
c. Skeleton. 
Dasyprocta prymnolopha. 
a. Skull.—The specimen described by Mr. Waterhouse in Nat. Hist. 
Mamm, ii. p. 381, 1848. 
6. Skull. 
Azara’s Agoutr. Dasyprocta azare. 
a—c. Skulls. Bolivia. From Mr. Bridges’ Collection. 
d, Skull, From the Zoological Society’s Collection. 
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