Allen.] ^4 . [ De c. G, 



mm. mm. mm. 



First phalanx fourth digit from 11 to 14 Range 3 



First " fifth " " 10 



Second " third " " 20 



Second " fourth" " 10£ 



Second " fifth " , " 10 



Third " third " " 10 



The length of the head appears to be subject to very slight variation, 

 namely, from 22 mm. to 23 mm. That of the ear, from 12 mm. to 13£ mm., 

 a slight difference and yet one which might disturb the novice in attempt- 

 ing to identify the species, since the proportion between the height of the 

 ear and the length of the muzzle is so often used in descriptions of bats. 

 In Carollia these quantities are not fixed. The height of the auricle is 

 variable, but the length of the muzzle is constant. No estimate of rela- 

 tions of measurements between them can be undertaken. 



The tragus varies in height from 5 mm. to 6 mm. It presents different 

 degrees of thickness along the median border. As a rule, very thick, this 

 border may be thin and membranous. The processes on the outer border 

 may be two or five, those toward the apex of the tragus tending to merge 

 in one another. This tendency appears to be most marked in males. 



The size of the nose-leaf is constant, being 10 mm. high and 6 mm. 

 broad. The lower border shows striking peculiarities in some specimens. 



Three of the males exhibited warts arranged in one or two rows across 

 the upper lip on the line occupied in Artibeus, Phyllostoma, etc., with a 

 well defined ridge or border. This variation is one of generic rather than 

 specific value. At least it does not indicate any disposition to reversion to 

 G. castanea, since in this species no warts are seen, the intervals between 

 the margins of membrane at the side of the base of the nose-leaf simply 

 being smaller than usual, and giving to the eye the appearance of extend- 

 ing directly across the lip. I know of no genus in which this variation 

 of the nose-leaf of Carollia brevicauda is a constant character. 



In G. brevicauda, the warts in the second row on the mentum are elon- 

 gate in all the nine examples, except one in which they are rounded and 

 do not differ from those of the first row. This arrangement resembles 

 that seen in C. castanea. 



It is probable that the two outermost rows of warts in G. brevicauda 

 coalesce to form the elongate wart, which, as a rule, exists. 



In reviewing the measurements of G. castanea, when placed in tabular 

 form with those of C. brevicauda, it is seen that in the species first named 

 that many of the measurements are the same ; that is to say, in some one 

 of the examples of G. brevicauda the measurement of a given part will be 

 found to be the same as in G. castanea. Thus the arm is of the same 

 length in three specimens of G. brevicauda. The length of the bones of 

 the digits find their complements in C. brevicauda, excepting the metacar- 

 pals of the fourth and fifth digits, which are shorter than in any example 



