HYSTRIX. 107 



Assam, Burma and the Malay peninsula, extending to the islands 

 of Sumatra and Borneo. 



All the skulls in the Museum of the crestless type of Porcu- 

 pine with one exception are of the type figured by Waterhouse 

 (/. c.) distinguished by their long posteriorly rounded and expand- 

 ed nasal bones, the other type figured by Waterhouse as H. 

 javanica is distinguished by its short truncated nasals which do 

 not reach as far back as the level of the lacrymal bone ; there is 

 one skull of this type in the Museum — see below under H. yunnan- 

 ensis ; there does not seem to be any real difference between the 

 three so-called species H. longicauda, H. bengalensis and H. hodg- 

 soni, unless it is that in the last named there is no trace of a crest, 

 whereas a small crest is present in H. bengalensis and H. longi- 

 cauda ; the skulls of these species vary enormously and no dis- 

 tinctions can be found which do not break down when a series are 

 examined. 



a. Skin, skull Nepal Valley, 4-78 J. Scully. 



b. Skin, skull Nepal B. H. Hodgson, A.S.B. 



c. Skin, skull Darjeeling E. Biyth (1832) A.S.B, 



d. Skin, skull Sikkim L. Mandelli. 



e. Skin, juv Arakan L. Mandelli, A.S.B. 



/. Stuffed skull E. Lindstedt, A.S.B. 



[Type of H. bengalensis, Blyth.] 



g. Stuffed, juv. A.S.B. 



A. Stuffed skull, Malacca A.S.B. 



y. Stuffed skull, Rajah R. Mullick 



29-12-71 



*. Skeleton, mtd. Rajah R. Mullick, A.S.B. 



/.Skeleton $ Babu H. M. Roy, A.S.B. 



m. Skeleton No history. 



n. Skull Assam F. Jenkins, A.S.B. 



OS. 5 Skulls No history. 



Hystrix yunnanensis. 



Hystrix yunnanensis, Anderson Anat. Zool. Res., p 332(1878). 



Distrihutio7i. — Kakhyen hills of Upper Burma. 



The skull of this species, as is pointed out by Anderson, 

 (/. f.) resembles very closely that of H. javanica, described and 

 figured by Waterhouse (Mamm., ii, p. 465, pi. xx, fig. 4), the great 

 feature of the skull being the short nasals which do not extend back 

 as far as the anterior level of the lacrymal bones and the consequent 

 increase in size of the frontals. Gunther (P. Z. S., 1 876, p. 737) has 

 described a species of Hystrix from Borneo as H. crassispinus, the 

 skull of which (woodcut fig. i), also agrees very closely with 

 the Yunnan skull ;the Borneo species, judging from the plate, does 

 not appear to be crested, in this resembling H. javanica, but it is 

 distinguished by its very large and thick spines, some of which 



