176 



vvhite colour, amidst the surrounding black fur. Ears large, nearly 

 as broad as long, simple in structure. The tragus is of a peculiar 

 form, having three points arranged likę a cross. 



The fur is soft and thick, exeept at the muzzle, where it is longer 

 and coarser than that of the other parts. 



The colour is a fine uniform black. 



Length of the head and body (English) 1" 7'" ; espanse 6" 4^'". 



Hab. S. America, Mona. 



2. FtJRIPTERUS C^RULESCENS, D. S. (PI. XLII.) 



Top of the head very much elevated, face depressed, excessively 

 hairy, only the end of the nose and the extreme edges of the lips 

 being naked. Ears as broad as high, roundish, with the tips angular 

 and directed somewhat outwards. Tragus short, supported on a nar- 

 row foot-stalk, iramediately above which is a descending process on 

 each side. From these it tapers rapidly to a narrow, but rounded 

 point, which is directed a little inwards. About the middle, between 

 the tip and the inner descending process, is a slight angular pro- 

 jection. 



The fur is everywhere long and silky. That of the upper parts is 

 slaty-blue at its base, slightly tipped with dusky-brown, but not suf- 

 ficiently so, as to appear bicoloured. On the head it is somewhat 

 paler than on the back. The long fur of the face is darker and not 

 quite so blue. The fur margining the lips is of a silky ash -colour. 

 The chin is of a uniform grey-brown, the breast blue-grey, the fur 

 tipped for a third of its length with whitish-grey. On the belly and 

 pubal regions it is nearly uniform whitish-grey. 



Of the specimens esamined, two are malęs and the remainder 

 females, and all are obviously adult. The sexes are similar. 



The great similarity in the size of the examples renders it unneces- 



sary for me to give the measurements of more than one. For the 



purpose of comparison I add the dimensions of the figure illustrating 



M. F. Cuvier's memoir. 



F. horrens. F. cesrulescens. 



Length of the head and body 1 6į 1 3 



i-ofthetail 1 1(?) ? 



of the head O O O 6 



of the ears O A\ O 3^ 



of the fore-arm 1 5 1 4 



■ of the longest fiuger 2 7 2 2 



of the fourth finger 1 7 1 9 



of the tibia O 7 O 6^ 



of the foot O 4 O 3i 



Expanse, following the bones, of the wings 9 3 8 9 

 Hab. St. Catharine, Brazil. 



Genus Natalus, Gray. 

 The forms of this genus bear considerable resemblance to those of 

 Furipterus. The crown is very much elevated, and a deep depres- 



