310 DR. J. E. GRAY ON THE SPECIES OF PORCUPINES. [May 22, 

 AcANTHOCHCSRUS BARTLETTII. 



The spines in the front of the body black, with short white tips ; 

 the crest extending the whole length of the nape ; spines on the 

 head slender, brown. 



" The Hybrid Porcupine;' Gray, P. Z. S. 1847, p. 103. 



Hab. 



" Bred in the Surrey Zoological Gardens, between a male Acan- 

 thion javanicum and a female Hystrix cristata." — Bartlett. 



AcANTHOCHCERUS GROTEI. (PI. XXXI.) 



Spines of the front of the body black ; the small nuchal crest of 

 a few elongated spines only on the front part of the nape ; spines of 

 the head black ; sides with some scattered elongated slender white 

 arched spreading spines. 



Hab. India (Grote) ; specimen in the British Museum ; a speci- 

 men living in the Zoological Gardens. 



Animal black, white-varied ; nape with a very slight compressed 

 crest, of rather longer black, white-tipped spines ; the spines of the 

 back elongate, thick, strong, very acute, white, with a single broad 

 black band rather above the middle of the spine. The spines in the 

 front part of the body flattened, grooved, whitish at the base and 

 black at the ends, appearing black ; some of those on the head and 

 neck with a white tip, the latter forming a narrow lunate half collar 

 round the lower part of the throat in front of the chest. The lower 

 part of the sides of the front of the body with exserted, elongated, 

 slender, curved, white spines, much longer than the usual spines of 

 those parts. The tail rather elongated, covered with white spines ; 

 the spines on the end of the tail truncated, with long slender cylin- 

 drical cup-like cavities. Whiskers black, cylindrical. 



3. ACANTHION. 



The nape covered with short grooved spines, without any indica- 

 tion of a crest. 



* The nasal bones very long and broad, to the middle of the orbit. 



Acanthion. 



1. Acanthion hodgsonii, Gray, P. Z. S. 1847, pp. 101, 128. 



Hystrix hodgsonii, Waterh. Mam. ii. p. 461, t. 20. f. 3. 

 H. daubentonii, Blainv. Osteogr. t. 2 (skull). 

 H.alophus, Hodgson, Journ. Asiat. Soc. Calcutta, 1 847, p. 7 72, t. 22. 

 H. nepalensis, Hodgson. 

 Hab. India, Nepal {Hodgson). 



There are two stuffed specimens and four skulls of the species in 

 the British Museum. 



** Nasal bones moderate, to the front edge of the orbits. 

 Acantherium. 



2. Acanthion javanicum, F. Cuvier, Mem. Mus. ix. t. l.f. 3, 4; 

 Gray, P. Z. S. 1847, p. 102. 



