354 



Zoological Society. 



the skull small. Dorsal vertebrae thirteen, with thirteen pair of rather 

 elongate slender ribs ; the spinous process of the first dorsal vertebra 

 as long as the second and following ones. The caudal vertebrae 

 fifteen. 



Inhab. India ? Java ? 



There is a skin and skeleton of this species in the collection of the 

 British Museum : it is a male which lived in the Surrey Zoological 

 Gardens for ten or twelve years. 



M. F. Cuvier established a species under the name of Acanthion 

 javanicum on a skull from Java in the Paris Museum. In the Ley- 

 den Museum there are several specimens of this or the next species, 

 which they regard as M. F. Cuvier's species. Neither M. Cuvier's 

 nor my notes on the Leyden specimens enable me to distinguish to 

 which the names belong. 



While living in the Surrey Zoological Gardens it bred with a fe- 

 male of the Common Crested Porcupine, and produced a hybrid spe- 

 cimen, which, with its skeleton, is now in the British Museum col- 

 lection. The animal is intermediate between the two species, having 

 only a short compressed crest ; and the skull is equally intermediate 

 in character, having the broad palate and oblong teeth of H. cristata, 

 and the more elongated form of the skull and the triangular inter- 

 maxillaries of the male parent. 



4. Acanthion Flemingii. Square-spined Porcupine. 



The palate between the grinders narrow (21 lines), and rather 

 wider behind between the last grinders. Condyle of skull large. 



The dorsal vertebrae fourteen, with fourteen pair of rather wide 

 ribs ; the spinous process of the first dorsal is nearly as long as the 

 second and third ; and of the second cervical is large and recurved. 

 Caudal vertebrae seventeen. 



Inhab. ? Skull in British Museum. 



Measurement of Skulls in inches and lines. 



Acanthion 

 Hodgsonii. 



Acan- 

 thion 

 Cuvieri. 



Acan- 

 thion 

 javani- 



Acan- 

 thion 

 Fle- 

 mingii. 



Length of skull above 



Length of nasals 



Width over middle of orbits 



Width of nose in middle 



Width of lower edge of zygoma . 

 Width of lower edge of zygoma "I 



to central.suture / 



Width of palate to middle of 1 



crown end of nasals J 



Length of skull beneath 



Length of palate 



Length of lines of grinders 



Length of lower jaw 



Width at ear bulla 



Width of the condyles 



Adult. 

 4 7* 



2 6 

 1 8 



1 3 



2 3 



3 

 1 

 11* 



Junior. 

 4 2 



1 9 

 1 6 



2 H 



1 



2 10 

 1 9 



Adult. 



5 6 

 2 9£ 

 2 3 



1 H 



2 11 



2 5 



2 3 



5 4 



2 11 



1 4 



3 10 



2 H 



l H 



4 6 

 1 10 

 1 7 



1 1* 



2 0^ 



4 5 

 2 3 



1 



2 10 

 1 10 



o ih 



4 5 



2 3 

 1 



3 

 1 10 

 1 H 



Hybrid. 



4 6 



1 10 



1 8 



1 2* 



2 1 



1 10£ 



1 8 



1 11 

 1 



