324 PROCEEDINGS OF THE ACADEMY OF [1889. 



membrane. A small portion of the radial side of the fold attached 

 to a fold lying directly upon the membrane. Extending from the 

 radius at this fold a vertical line is conspicuously seen. 



Predigital, one only; it arises high up from the fifth metacarpal 

 bone and extends obliquely across membrane. Postdigital absent. 



The postdigital is absent in the, third interspace. 



Interfemoral membrane with pubotibial line. A vertical line is 

 seen extending entire length of membrane at a point midway 

 between the tail and the leg. The membrane occupied by a set of 

 numerous transverse lines and a second oblique set. 



Membranous terminal phalanges apparently absent. The specimen 

 is in bad condition. 



Atalapha cinerea. 



The prebrachium without details. The lines of the endopatagium 

 are indistinct owing to the hairiness of the membranes. The inter- 

 costo-humeral line extends to the free margin as in Miniopteris and 

 Emballonura. 



The internal-cutaneous system crosses the elbow at origin, is with- 

 out vertical branch, but yields two horizontal primal branches ; these 

 extend across the membrane near each other and appear to end in 

 the abruptly determined comb-like endings which do not reach the 

 region of the phalanges of the fifth finger. There are two oblique 

 lines extending downward and somad from the muscle-mass at distal 

 end of the fifth finger. 



The fourth interspace has the predigital nerve as in Miniopteris 

 while the terminal branches do not reach the digits of the fifth 

 finger but join a branching nerve which appears from the metacarpo- 

 phalangeal joint' of the fourth finger. A small unbranched line 

 (postdigital nerve ?) appears at the middle of the fourth metacarpal 

 bone. 



Two oblique bands are seen on the fourth interspace near the 

 palm. A fork-like arrangement of lines is seen in the angle between 

 fourth and fifth metacarpal bones and appears to be a branch of the 

 median dividing into the two branches commonly seen in this inter- 

 space. In the third interspace a similar arrangement is seen but the 

 main nerve pursues a longer course before dividing. At the region 

 of the digits there are two predigital nerves and three postdigitals. In 

 this portion of the membrane therefore an unusually large number 

 of lines are seen. It is possible some of these lines pertain to the 

 blood vessel system. 



