lo8 MAMMALIA. 



are twice as thick as an incisor tooth ; the Yunnan species on the 

 other hand, has a small crest and the spines are of a moderate size, 

 at least none are as large as the incisor teeth. 



The skull of H. javanica, which was figured by Cuvier (Mem. 

 Mus. Paris, ix, pi. ix, figs. 3-4) seems to be of the Same type as 

 H. longicauda with posteriorly extended and swollen nasals. 



a. Skin, skull Kakhyen hills J. Anderson. 



[Type of Hystrix yunnanenis, Anderson.] 



Genus LAGOSTOMUS. 



Lagostomus, Brookes Linn. Trans., jtvi, p. 102 (1828). 



Lagostomus trichodactylus. 



Lagostomus trichodactylus, Brookes Linn. Trans., Kvi, p. 102, pi. ix (1828) ; 

 Waterhouse Nat. Hist. Mamm., ii, p. 212. 



The Viscacha. 



Distribution. — The open plains of the southern part of South 

 America. 



a. Skeleton W. Rutledge. 



Genus CCELOGENYS, 



Coelogenus, F. Cuvier Ann. Mus., Paris, ii,p. 203 (1807). 

 Ccelogenys. Illiger Prodr,, p. 92 (l8ll). 



Coelogenys paca. 



Mus paca, LinncBus Sysi. Nat., 12th ed., i, p. 81 (i866), 



ct°ollZl f'dvuf ' ] ^- ^--' '^«»- ^-•. -P-". -. P- ^06, pi., ix (.807). 

 Coelogenys paca, Blyth Cai. no. 420, p. 128 (1863) ; Alston Biol. Centr. 

 Ainer. Mamm., p. 174. 



Distribution. — From Vera Cruz in Mexico southwards through 

 Central and South America to Paraguay. 



o. Skin No history. 



b. Skin W. Rutledge. 



d. Stuffed South America. E. BIyth, A.S.B. 



e. Stuffed Purchased. 



/. Skeleton mtd. E. BIyth, A.S.B. 



g-h. 2 Skulls E. BIyth, A.S.B. 



Genus CAVIA. 



Cavia, Pallas Miscell.Zool,. p. 30 (1766)*. 



