137 



The number of the teeth is as follows : — 



In. t? , Car.. j=! , Pre. Mol. g ; Mol. g-g. 



The upper incisors are arranged in pairs, of which the inner one 

 of each pair is much larger than the outer one. They are all some- 

 what elongated, conical, and pointed, and when viewed in front are 

 seen to have their points directed inwards, but when seen laterally 

 have nearly a vertical direction, similar in this respect to the canines. 

 A considerable interval separates them on each side from the latter 

 teeth, and this, with their regular conical outline and nearly vertical 

 position, constitute their chief peculiarities. In the centre, between 

 the inner ones, is a considerable opening, caused by the non-deve- 

 lopment of the anterior margins of the intermaxillary bones, and the 

 notch in the front of the palate, just as in the Nodule Bat and most 

 other true Vespertilionidee. The other teeth in the upper jaw pre- 

 sent no deviations from what is usual in the genus. 



In the lower jaw the incisors are of the form ordinarily observed 

 in this genus ; they are symmetrically arranged and trilobed. The 

 canines present no marked peculiarities of form. The premolars are 

 small, pointed, and have their basal cusps less developed than those 

 of the corresponding teeth in the Noctule Bat. The first of these 

 teeth is much the smaller of the two. The molars differ in no re- 

 spect from those of the above-mentioned species, excepting that their 

 cusps are perhaps somewhat longer and more pointed. 



In the following Table of dimensions, the first column represents 

 the measurements of the specimen in spirit in the Museum of the 

 College of Surgeons, before alluded to, and the other columns have 

 been taken from specimens in skin in the British Museum : — 



Length of the head and body. 



of the tail 



of the head 



of the ears 



of the tragus 



of the fore-arm 



of the longest finger . 



of the fourth finger . 



of the thumb 



of the foot and claws . 



Expanse of wings ......... 



No. 1. 



Nc 



.2. 



No. 3. 



2 1 



" 



'" 



// /// 



1 7 



1 



6 





o n 









3-i 



If 



1 6 



1 



6 



1 6 



2 8 



2 



10 



2 8 



1 10 



1 



10 



2 



% 

 3f 





 



H 



4 



3| 

 4 



10 9 



10 



4 





1 



6 



2 



7 



2 











3h 







4 



The foregoing description had been taken with a view to its pub- 

 lication, before that of Forster had been examined, the impression at 

 that time being that the species was new. 



For the convenience of immediate comparison, and to show the 

 general similarity of the two descriptions, a condensed description 

 will now be given of that furnished by Forster. 



About the size of Vesp. communis, or a little larger ; the head 

 like that of a mouse, and of medium size ; snout blunt, emarginate, 



