220 



In the mandible the lower incisors diminish progressively behind ; 

 the canine is larger, and resembles the upper canine, but has only 

 one root ; the first two preinolars are small, the third larger, the 

 fourth still larger, and higher than the molars, of which the first, 

 as in the upper jaw, is the largest tooth in the jaw, the others 

 diminishing in size progressively. 



The vertebral formula differs considerably in the two species. 

 Mammae two pairs : one thoracic, near the axilla, the other pair 

 inguinal. 



Both forms of Gymnura somewhat resemble large shrews. Until 

 lately they have been placed in distinct genera, the smaller form 

 being classed as Hylomys', but Dobson has united them, and 

 although I feel some misgivings as to their being congeneric, there 

 can be no doubt about their near relationship. Both occur in 

 Burma, but are unknown west of the Bay of Bengal. 



Synopsis of Burmese Species. 



A. Larger ; head and body 12 to 14 inches ; tail three 



fourths that length G. rafflesi, p. 220. 



B. Smaller ; head and body about 5 inches ; tail one 



sixth that length G. suilla, p. 221. 



109. Gymnura rafflesi. Raffles' s Gymnura. 



Viverra gymnura, Raffles, Tr. L. S. xiii, p. 272. 



Gymnura rafflesii, Horsjicld and Vigors, Zool. Journ. iii, p. 248, pi. 8 



(1827) ; Cantor, J. A. S. B. xv, p. 190; Myth, Cat. p. 81 ; W. 



Blunf. J. A. S. B. xlvii, pt. 2, p. 150 ; Anderson, Cat. p. 158 ; 



Dobson, Mon. Ins. p. 3. 



Fig. 57. Gymnura rafflesi. 



Tail about three fourths the length of the head and body, com- 

 pressed towards the tip, naked, scaly, the scales small and arranged 

 in rings, between which short hairs project, becoming coarse 

 bristles on the under surface, where the scales are more convex 

 and more distinctly imbricate than above. Ears short, rounded, 



