MURID.E,—OCTODON, 185 
HABROCOMA. 
Teeth :—Incisors a Molars ; =20. 
Bennerr’s Hasrocoma. Habrocoma bennettii. 
Molina, Storia del Chile, pl. 6. fig. 5 (skull), fig. 5 a, b, ¢ (dentition). 
— Waterhouse, Nat. Hist. Mamm. ii. p. 248. pl. 8. fig. 1 (skull and 
lower jaw). 
Cervical vertebre........ ween (G0 
Dorsal iwi sak Wawra s awe ow es 17 
Lunar pssst 3 eee as 5 
Sacral: upc aoe ries lose earn 4 
Caudal eee goi.do des cee wb eaves ws 23 
a,b,c. *Skulls. Chili. From Mr. Bridges’ Collection. 
d, Skull: young. Chili. From the Zoological Society’s Collection. 
OCTODON. 
Molars *!;=20. 
Teeth :—Incisors — ; ae 
1-1? 
Bripezs’ Ocropon. Octodon bridgesii. 
Waterhouse, Nat. Hist. Mamm. ii. p. 259. pl. 8. figs. 3 & 2 6 (skull and 
lower jaw). 
a—c, *Skulls. Chili. From Mr. Bridges’ Collection. 
The Cucurerro or Decus. Octodon degus. 
Waterhouse, Nat. Hist. Mamm. ii. p. 258. pl. 8. figs. 2 & 2 a (skull and 
lower jaw). . 
Octodon cumingii, Molina, Storia del Chile, pl. 6. fig. 7 (dentition).— 
Brandt, Mém. Acad. St. Pétersb. iii. pl. 7. figs. 9-14 (skull)- 
Dendrobius degus, Schred., Saugth. iv. pl. 239 ©, D. fig. 1 (dentition). 
Cervical vertebre.............. 7 
Dorel ii3.cjes coe acai en deacon 12 
Lumbar - css siecee Sal sees oe ng es 6 
Saenall: see wis acd yaa ee aes 4 
Caudal nukes a9 cada ease eas 26 
a. Skeleton. = 
6. Skull. 
*¢, Skull (white var.). > Chili. From Mr. Bridges’ Collection. 
*d, Skull. 
e, f. Skeletons. 
g. Skull (white var.). From the Zoological Society’s Collection. 
The Dormovsr Ocropon. Octodon gliroides. 
D'Orb., Voy. ix. pl. 16. fig. (skull). 
