Mr. Montac u's Account of some Specks of Bah. 165 



haunt of Vespertilio Ferrum-cquinum ; but my wishes have since 

 been amply gratified, by taking nine of the V. Ferrum-cquinum, 

 and seven of the mmutus, many of which were conveyed 

 home alive : of the former there were four males and five fe- 

 males; of the latter five males and two females. Of the 

 r. Ferrum-equiniim the largest and smallest were both females, 

 one preponderating four drams and a half, the other not exceed- 

 ing four drams. The length of these to the setting on of the 

 tail two inches and a half; to the end of the tail three inches and 

 three quarters: the expansion of the wings about fourteen 

 inches and a half. 



In colour these two species are perfectly similar, except in 

 some instances the sides and breast of the V. Ferrum-cquinum are 

 more of a ferruginous-brown. 



With respect to the face, which is so extremely curious, there 

 appears on a cursory view scarcely a perceptible difference, ex- 

 cept that the upper lip of the V. Ferrum-cquinum is much more 

 tumid; but the most material distinction is in the formation of the 

 nasal membranes, especially that which is posterior and trans- 

 verse. To explain this no words can convey what a simple 

 outline will, and therefore the curious are referred to Tab. X VIII. 

 Jig. 5. which represents the side view of the membranes of 

 V. Ferrum-equinum, of which a is the posterior transverse one ; the ' 

 front is seen atfig. 6. The same views are given of the nasal 

 membrane of V. minutus at Jig. 7. and 8, where b b represent 

 the membranes in different points of view. In these a very 

 striking difference is observable, and it will also be perceived 

 that the anterior longitudinal membrane is by no means similar 

 in both species. 



With respect to the teeth, it will be observed that the V. Fer- 

 rum-equinum possesses two minute distant fore teeth in the upper 



