ON MAMMALS FROM BILLITON. 153 



straight till close to the angle of the mouth , without for- 

 ming a lobe. Inner margin of tragus concave, tip obtusely 

 pointed and curved inwards, outer margin convex, at the 

 base of the outer margin a distinct triangular lobe. 



Wings from the base of the toes ; tip of tail projecting ; 

 a distinct although small post-calcaneum lobe. 



Wing-membranes along the side of the body hairy and 

 colored like the back , for the rest naked ; underside of 

 interfemoral with fine hairs arising from transverse dotted 

 lines like in Vespertilio muricola Hodgson. 



All the hairs are of a dark brown color, lighter towards 

 the tips. The naked wing-membranes are pure white , con- 

 trasting strongly with the dark colored body. 



Inner upper incisor long, with a well-defined external 

 cusp , outer incisor, well-developed , attains about the level 

 of the external cusp of the inner incisor. Lower incisors 

 trifid. Second upper premolar about two third of the height 

 of the canine ; first upper premolar very small , hardly 

 visible without a lens, and placed inside the tooth-row, 

 so that it is not visible from without ; first lower premolar 

 half the size of the canine, second lower premolar higher 

 and in the same level with the most developed cusp of the 

 first molar. 



Measurements in millimetres: 



head and body 50 



tail 32 



ear 13 x 8 



tragus 5x2 



forearm 33 



thumb with claw 5 



second finger, metacarpal 30 



» » 1st phalanx 13 



third finger, metacarpal 31.5 



» » 1st phalanx 11.5 



» » 2n'l » 11 



» » 3'^*i » 5 



fourth finger, metacarpal 31 



Notes from the Leyden JMuseucn , Vol. XII. 



