Mr. 0. Thomas on a new Species ofHelictis. 331 

 B. Digits free or with a very indistinct web. 



Upper jaw notched in the middle, bicuspid ; 

 hind limb with three clawed digits ; six verte- 

 bral shields 3. C. mexicana, Gray. 



Upper jaw notched in the middle, bicuspid; 

 hind limb with three clawed digits ; five verte- 

 bral shields 4. C cinosternoides, Gray. 



Upper jaw without notch ; hind limb with 

 four clawed digits 5. C. Carolina, L. 



IT. Plastron incompletely closing the shell, 

 with a very short but distinct bridge ; no 

 vertebral keel on the carapace ; fingers all 

 with two phalanges 6. C. ornata, Ag. 



In shape and size (length 145 millim.) the shell of G. yuca- 

 tana resembles more C. Carolina^ but it is, in one of the 

 specimens, rather more elongate. The shields of the carapace 

 are yellowish, bordered with dark brown and with small 

 irregular brown spots, or nearly uniformly dark brown. The 

 plastron is yellow with large dark brown blotches, or dark 

 brown with the borders of the shields yellow. 



The suture between the gular shields is longer than that 

 between the pectorals, and that between the anal shields is 

 nearly as long as the distance which separates them from the 

 plastral hinge. 



XL. — Description of a neio Species ofHelictis/rom Borneo. 

 By Oldfield Thomas. 



The genus Eelictis^ whose members range from Nepal and 

 China to Java, has not hitherto been known to occur in 

 Borneo, and Mr. Everett, to whom this fact was of course 

 well known, was proportionally pleased when his collectors 

 brought him from Mount Kina Balu four skins referable to 

 this striking group of Carnivores. Two of these specimens 

 have now been acquired for the British Museum, and prove 

 to represent a new species, which I propose to call after its 

 discoverer. 



Helictis Everetti, sp. n. 



Size small ; form, as judged by the skull, light and delicate. 

 Coloration generally dark, the white markings of the head 

 and neck less developed than in any other species known. 



