1889.] NATURAL SCIENCES OF PHILADELPHIA. 319 



The fourth interspace. The predigital appears at the middle of 

 the fifth metacarpal bone. The postdigital is curved and appears 

 just proximal to the end of the fourth metacarpal bone. 



The third interspace. The predigital from the fourth meta- 

 carpophalangeal joint. 



A well-defined longitudinal line is seen in the third interspace 

 but none in the fourth. 



The fourth phalanx of the third finger is flexible as in Artibeus. 

 The fourth phalanx of the fourth finger is minute, scarcely visible, 

 axial ; that of the fifth finger is membranous, and deflected somad. 



Diphylla ecaudata (dried skin). 



The endopatagium with intercostals six in number distinct, the 

 lowest is the longest. The intercosto-humeral arises near the axilla 

 and does not reach the elbow. 



The internal cutaneous apparently without vertical or oblique 

 branches. A distinct oblique fold, as in Noctilio, passes downward 

 from the muscle-mass of the fifth metacarpal bone. Secondary lines 

 about fifteen in number, but do not approach the fifth digit or the 

 radio-metacarpal angle. 



The only line seen in the ectopatagium is the oblique predigital 

 of the fourth interspace. It appears at the middle of the fifth 

 metacarpal bone. The terminal digits apparently much the same 

 as in Desmodus. 



Brachyphylla cavernarum. 



Prebrachium ample, volant entire length. A thickened border 

 is seen but no markings. 



The lines of the endopatagium, which appear to represent the inter- 

 costals, four in number. A great number of more delicate lines, which 

 appear to be connective-tissue trabecular with nerve-endings, are also 

 seen. The intercosto-humeral line is first seen at the middle of the 

 humerus. It forks once and ends at the margin of the membrane 

 on a line with the elbow. 



The internal cutaneous line sends a vertical branch downward 

 at the elbow, and a second, half-way along the course of the line. 

 Two superior oblique lines are seen. Fifteen vertical lines, most 

 of which transect the main line, can be counted. 



The fourth interspace with predigital line from the distal third of 

 the fifth metacarpal bone. The postdigital from the metacarpo- 

 phalangeal joint of the fourth digit. The longitudinal line confined 



