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Zoological Society: — 



sistance of my friend Dr. Peters, who happened to be present on the 

 occasion. The skull of Hystriv malabarica, which is that of a very 

 old animal with the molar teeth worn very low and the cranial sutures 

 nearly obliterated, agrees in the shape of the nasal and intermaxillary 

 bones with II. leucurn. As in the latter species, so in H. malabarica 

 the nasal bones have their sides nearly parallel with the hinder mar- 

 gin, terminating nearly in a line with the anterior edge of the orbit, 

 and the nasal processes of the intermaxillaries are broad and truncated. 

 At first I was inclined to think there was some difference in the pat- 

 terns of the molar teeth of the two species, those of H. malabarica 

 being surrounded by a complete cingulum of enamel, and the internal 

 areas being completely isolated, which is not the case in H. leucura. 

 But this, I suspect, is only due to the age of the specimen. It would 

 therefore be desirable to have further specimens of the skull of H. 

 malabarica for comparison upon this point ; but in other respects 

 there seem to exist differences in the skulls of the two species which 

 are amply sufficient to confirm their specific separation. 





Skull of Hystrlx malabarica. 



1 . In //. leucura the total length of the molar series is greater 

 than the distance between the molars and the tympanic bone ; in //. 

 malabarica it is rather less. 



2. In H. malabarica the entopterygoid is more remote from the 

 tympanic bone, and is of a different form. 



3. The facial surface of the lachrymal is very small in H. mala- 

 barica — much smaller than in II. leucura. 



4. The rostral part of the cranium is more elongated and more 



