180 



the whole of its length, but with a rounded prominence at its base. 

 The face is very bairy, and the upper lip has a distinct moustacbe of 

 long hair. 



On the whole of the upper parts the fur is of a reddish-brown 

 colour, uniform in tint from its root to the tip. On the under parts 

 it is pure white, tinged with rufous on the humeral region and on the 

 chin. 



This species appears to differ from the lašt in having the ear much 

 more hollowed out externally, in being somewhat larger, and in 

 having the under parts pure wbite. 



Length of the head and body 2 O 



of the tail, about 1 2 



of the head O 9 



of the ears O 3|* 



of the fore-arm 1 5^ 



of the longest finger 2 6^ 



of the fourth finger 1 10 



of the tibia O 8i 



of the foot and claws O 3 



Expanse of wings, foUovving the phalange. .10 6 



Hab. River Napo, near Quito, where it was coUected by Mr. Bates. 



In addition to the generic characters given by the authors already 

 quoted, the very peculiar form of the claws of the hinder feet may be 

 mentioned. These are rather long, have a small degree of curvature, 

 are very slender, and not compressed laterally as in other Bats. 

 Their under surface is rather deeply hollowed out ; in this respect 

 they bear considerable resemblance to the clavvs of some Rasorial 

 birds, such as the genus Tetrao, but they are relatively more slender. 

 From their form they could scarcely be used as organs of suspension, 

 and it is not improbable that the conspicuous discs attached to the 

 thumbs and feet may answer the šame purpose that claws are knowa 

 to do in the ordinary Bats. 



The elevated form of the cranium deserves special attention, as 

 indicating an affinity in this particular with the genera Furipterus 

 and Natalus. 



The peculiarity of having the wing membranes extend to the 

 claws is not restricted to this genus, as I have observed it in the 

 Vesp. sidllus of M. Temminck. This species has been considered 

 by Dr. Gray to be sufficiently dissimilar from other examples of the 

 genus Vespertilio, to merit generic distinction, under the name of 

 Murina, Another species from Ceram {Vesp. vulpinus, Temm. Mas, 



case in the speciraen I possess, but in the figure already referred to, this is less 

 conspicuous. 



* In taking the measure of the ear, it is my custom to consider it as a simple 

 projection, and to measure along the line of greatest convexity of the hinder sur- 

 face. This imaginary line will proceed from that part of the base nearest the 

 crown, to the tip of the ear. A line along its anterior or posterior raargin would 

 be rather an indication of form than of absolute length, and should therefore be 

 given additionally if the form of the ear seems to reąuire it. 



