OSTEOLOGY AJS^D DENTITION OF HYLOMTS. 467 



Tupaia, however much in general form it resembles the last-named genus, from which 

 it is widely separated in the details of its structure. Witness how different the pterygoid 

 region of the skull is from that which occurs in Tupaia, and in contrast to the characters 

 of which may be enumerated its imperfect tympanic bullae, its slightly excavated basi- 

 sphenoid, its paroccipital and mastoid processes, the imperfect orbit, the ridge before 

 the latter, the imperforate malar, the palate without defects of ossification, and its 

 dentition — besides other details of its skull, all of which, along with the foregoing, 

 demonstrate that its nearest affinity is with Oymnura, and through Gymnura with 

 Erinaceus. Added to these are the characters of its scapula and pelvis, which resemble 

 the corresponding structures in Gymnura ; and, like the latter, Hylomys has the 

 important feature of a united tibia and fibula. 



It is to be regretted that the viscera had been removed from Blyth's specimens when 

 they were originally preserved, and that those of my specimens had been entirely 

 destroyed by insects ; otherwise these remarks might have been supplemented by the 

 characters of the digestive tube. 



DESCEIPTION OF THE PLATE. 



PLATE LXIV. 



Fig. 1. Side view of head of spirit specimen of H. peguensis, Blyth. 



Fig. 2. Inferior view of skull. 



Fig. 3. Upper view of skull. 



Fig. 4. Side view of skull and mandible. 



Fig. 5. Side view of teeth of upper jaw (twice nat. size). 



Fig. 6. Teeth of upper jaw seen from below (twice nat. size). 



Fig. 7. Teeth of lower jaw seen from above (twice nat. size). 



Fig. 8. Skeleton (nat. size), H. peguensis, Blyth. 



Fig. 9. Tenth dorsal to fifth lumbar vertebra (twice nat. size). 



Fig. 10. Upper surface of atlas. 



Fig. 11. Side view of axis. 



Fig. 12. Dorsal view of axis. 



Fig. 13. Left scapula. 



Fig. 14. Right humerus. 



Fig. 15. Right radius and ulna. 



Fig. 16. Left OS innominatum. 



Fig. 17. Right femur. 



Fig. 18. Right tibia and fibula. 



Fig. 19. Sternum. 



