DESCRIPTIONS OF NEW SPECIES OF MAMMALS. 797 



relatively larger, and the contrast in size between the second and the other 

 two is more marked. 



Measurements. — External measurements of type : Total length, 200 mm, ; 

 head and body, 114 ; tail, 86 ; hind foot, 26, 



Cranial measurements of type : Greatest length (exclusive of incisors), 

 25-6 mm. ; basal length, 24-8 ; basilar length, 22 ; palatal length, 1 1 ; width of 

 palate between middle molars, 3*2 ; mastoid breadth, 11 ; lachrymal breadth, 

 6 ; mandible (without incisor), 15 ; maxillary toothrow, 12 ; mandibular 

 toothrow, 11. 



Specimens examined. — One, the type. 



Remarks. — This species, though closely related to Crocidura nicobarica, 

 appears to be well characterized by its smaller size, larger unicuspid teeth, 

 and distinctly gray colour. 



Genus PIPISTRELLUS Kaup. 

 PipiSTKELLUS CAMOKT^, uew species. 



1861. ? Vesperugo nicobaricus Fitzinger, Sitzungsber. Math.-Naturwis- 

 sensch. CI. Kais, Akad. Wissensch., Wien, XLII (1860), p. 390 

 (nomen nudum'). 



1869. ? Vesperugo tenuis Zelebor, Reise der osterreichischen Fregatte 

 Novara, Zool., I (Wribelthiere), 1, Mamm,, p. 16 (Nicobars). 



1876. ? Vesperugo abramus Dobson, Monogr. Asiat. Chiropt., p. 212 

 (Nicobars). 



Type.— Adivdt male (in alcohol) No, 11 1897, U.S,N,M, Collected on Kamorta 

 Island, Nicobar Islands, February 12, 1901, by Dr. W, L. Abbott. 



Characters. — Externally much like Javan specimens of Pipistrellus abramus, 

 but slightly smaller, the ears shorter and broader, and penis considerably 

 shorter than tibia. Skull with broader rostrum and smaller audital bullas. 

 Teeth as in P. abramus, the inner upper incisor bifid. 



Ears. — The ear is moderately long ; laid forward it extends about to 

 nostril. Anterior border nearly straight from base to broadly rounded-ofE 

 tip. Posterior border straight from just below tip to about middle, then 

 strongly convex to notch isolating low but well-developed antitragus. Tragus 

 short and broad, its greatest width nearly equal to length of anterior border. 

 Posterior outline evenly convex except where interrupted by a small but 

 very distinct lobe near base. Anterior-border slightly concave. 



Feet. — The foot is smaller than in Pipistrellus abramus. Calcar fading in- 

 sensibly into ux'opatagium, but provided with a very distinct keel, considerably 

 larger than that of P. abramus. 



Membranes. — The membranes are thin and delicate, but do not show any 

 pecaliarities of importance. They are naked except close to body. Wing 

 from base of outer toe. 



Penis. — The penis, though much larger than in Pipistrellus pipistrellus and 

 P. kuhli, lacks the enormous development characteristic of P. abramus. Its 

 length equals about two-thirds that of tibia. 



