1877.] W. T. Blanford— Spiraculum Mastcrsi. 313 



of the tragus ; tragus narrowest opposite the base of its inner margin, ex- 

 panded above and curved inwards. 



Thumb short with a very acute claw ; a hroad adhesive cushion 

 occupies the base of the inferior surface of the metacarpal hone and extends 

 outwards and backwards upon the base of the metacarpal of the second 

 finger. 



Feet very small, the sole of the foot apparently adhesive but not 

 expanded as in V. pachypus ; post-calcaneal lobe remarkably large, (pro- 

 bably proportionately larger than in any other species of bat,) and broader 

 than the foot, with a central cartilaginous prop : the extreme tip of the 

 tail alone i^rojecting. 



Fur dark reddish-brown above, slightly paler beneath. Penis loitli a 

 distinct hone, in shape quite similar to that of V. Ticlcelli, and with a 

 similar prepuce.* 



Dentition almost similar to that of F. Ticlcelli, the outer upper 

 incisors are even smaller and j^^^ced more behind the inner incisors ; 

 the inner incisors unicuspidate and very acutely pointed ; lower incisors 

 trifid, and placed in the direction of the jaws ; the single upper premolar 

 close to the canine ; the first lower premolar with a very short and obtuse 

 cusp, the second equals three-fourths the canine in vertical extent. 



Length, head and body, 1""75 ; tail 1"*1 ; head 0"*6 ; ear 0"-45 ; tragus 

 0'''18 ; forearm l^'l ; thumb 0"-15 ; third finger (metacarpal l"-0 ; 1st ph. 

 0"-6 ; 2nd ph. 0"-6) ; fourth finger (metacarp. l"-0 ; 1st ph. 0"-53 ; 2nd ph. 

 0"-28) ; fifth finger (metacarp. 0"-95 ; 1st ph. 0"-35 ; 2nd ph. 0"-22) ; tibia 

 0"-45 ; foot 0"-25. 



Hab. Tenasserim. 



This species is about the size of Vesperugo (Vesperus) minutus. 

 Temm. from South Africa, and is, therefore, one of the smallest species of 

 the genus. It is not half the size of V. Tichelli, with which it agrees in 

 other respects so closely. Its resemblance to that species in the position 

 of the upper outer incisors, and in the form of the penis, which has a dis- 

 tinct bone, is very remarkable. 



XIII. — Description 0/ Spiraculum Mastersi, — By W. T. Blaot^oed, 



F. R. S., &c. 

 The shell described below was collected with several others in 18G0 

 by Mr. Masters in the hills south of the Assam Valley, not far from Golaghat. 

 I described all the species, but the paper was never published. Some of 



* See description of T. Tickelli in MoBOgr. Asiat. Chiropt. p. 114. 



