K 



88 ZOOLOGY OF THE VOYAGE OF THE BEAGLE. 



Family— CHINCHILLID^. 





Lagostomus trichodactylus. 





Lagostomus trichodactylus, Brooks, Transactions of the Lin nean Society, vol. xvi. p. 95, PL 9. 

 La Yizcache, Azara, Essais sur l'Histoire Naturelle des Quadrupedes de la Province du Paraguay, 



vol. ii. p. 41. Trad. Franc. 

 Yischacha, Meyen, Acta Academise, c. L c. Naturae Curiosorum, Tom. xvi. pars 2, p. 584. 



> 



Habitat, La Plata. 



" I will not repeat what I have said about the habits of this animal in my 

 Journal, as it is merely a corroboration of Azara's account. According to that 

 author, the Bizcacha is not found north of 30°; and its southern limit occurs in the 

 neighbourhood of the Rio Negro in 41°. Where the plains are gravelly, it is not 

 abundant, but (differently from the Cavia Patagonica,) it prefers an argillaceous and 

 sandy formation, such as that near Buenos Ayres. The Bizcacha abounds over 

 the whole Pampas, even to the neighbourhood of Mendoza, and there it is replaced 

 in the Cordillera by an Alpine species. Of the latter animal, I saw one seated on 

 a pinnacle at a great height, but I could not obtain a specimen of it. Azara* has 

 remarked that the Bizcacha, fortunately for the inhabitants of Banda Oriental, is 

 not found to the eastward of the Rio Uruguay ; and what makes the case more 

 remarkable is, that although thus bounded by one river, it has crossed the broader 

 barrier of the Parana, and is numerous in the province of Entre Rios. I was 

 assured by a man, whose veracity I can perfectly trust, that these animals, quasi 

 canes, post coitum adnexi sunt." — D, 



Family — CAVIID^. 



Kerodon Kingit. 



Kerodon Kingii, Bennett, Proceedings of the Zoological Society of London for 1835, p. 190. 





Habitat, Patagonia. 



" The Kerodon is common at intervals along the coast of Patagonia, from the 



* Azara ' Voyages dans l'Amerique Meridionale,' vol. i. p. 316. 



