1889.] NATURAL SCIENCES OF PHILADELPHIA. 321 



Emballonura semicaudata. 



The prebrachiuni with middle third of margin thin ; answering to 

 it is a concave line about 2 mm. distant in the center but reaching 

 margin of membrane at the ends of the middle third ; passing down- 

 ward from the crescent thus defined are four oblique lines. The 

 prebrachiuni as it joins the shoulder is slightly thickened. 



The endopatagium with indistinct lines, the general disposition of 

 which are the same as in Miniopteri*. The lowest line appears 

 to arise from the knee. The intercosto-humeral line quite the same 

 as in Miniopteris. 



The internal-cutaneous much the same as in this genus, but is less 

 developed, the terminal branches being smaller. 



A tendon lies on endopatagium forming a concave line along side 

 of the first digit of the fifth finger. The fourth interspace shows a 

 single nerve, viz., the predigital which appears at the middle of the 

 muscle-mass at distal end of the fifth metacarpal bone and passes 

 obliquely downward and forward across the entire interspace. In 

 the third interspace a nerve appears from the opposed metacarpo- 

 phalangeal joints, as in Vampyrus, Noctilio, etc. 



The lines in the interfemoral membrane as in Noctilio, with the 

 exception that the pelvic line extends to the free margin instead of 

 to the middle of the tibia. 



The terminal phalanx of the third finger sickle-shaped not 

 cartilaginous ; the membrane is attached to its tip, and is without 

 pigment in the space which answers to a line unitiug the two ends 

 of the phalanx. The terminal phalanx of the fourth finger is 

 acicular, the extreme tip alone projecting from the membrane ; that 

 of the fifth finger is half the length of the last named, presents a free 

 tip, and is entirely free on the outer (pollical) side. 



Saccopterya leptura. 



Prebrachiuni is abruptly narrowed at the distal end of the muscle- 

 mass of the forearm ; thence it gradually widens to the thumb. The 

 margin is crescentic, and almost equals the rest of the membrane in 

 area. The membrane is traversed by a single line apparently from 

 the external-cutaneous nerve. 



The intercostals eleven in number. The intercosto-humeral rudi- 

 mentary scarcely reaching to the elbow. Internal-cutaneous line 

 with a sharply curved branch descending from near elbow. The 

 superior oblique single. The main line extends obliquely toward 

 the end of the fifth digit. 

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