336 PROCEEDINGS OF THE ACADEMY OP [1889. 



tendons cross (beneath the skin) the angle of the fourth interspace. 

 These do not correspond to the raised folds of Pteropus. In the third 

 interspace the predigital nerve appears at the fourth metacarpo- 

 phalangeal joint and extends parallel to the first digit to the first 

 interphalangeal joint. From the middle of this nerve a branch 

 passes obliquely downward and outward. No arrangement similar 

 to this is seen in any other form. In the second interspace with a 

 distinct predigital nerve. 



In Hypsignathus (dried skin) the predigital is as in Pteropus. 

 Thus this genus is distinguished from JEpomophorus franqueti by a 

 character of the mesopatagium. 

 Pteropus vulgaris. 



The tendon concealed in margin of the prebrachium, and becomes 

 apparent only at the distal fifth of forearm. Two oblique lines pass 

 upward toward the tendon from the line of the forearm. 



Endopatagium with a few faintly traced intercostal lines, two of 

 which become fleshy interiorly. These, the crural line and the inter- 

 costo-humeral line distinct, raised and unbranched. 



The internal cutaneous line with two superior oblique branches. 

 The main line ends at the terminal digit of the fifth finger without 

 division. Six vertical raised lines (and several smaller ones near 

 the fifth finger) cross the membrane. 



The fourth interspace with the predigital from metacarpopha- 

 langeal joint, and the postdigital from the first phalanx just below 

 the joint. The angle of the interspace crossed by a raised fold. 

 The third interspace with the predigital nerve appearing from the 

 first phalanx of the fourth finger just above the interphalangeal 

 joint. The nerve is curved forward, while the postdigital is straight 

 and appears near the distal end of the first phalanx of the third 

 finger. As with the fourth, the third interspace is crossed by a 

 raised fold. The cruro-tibial fold of the interfemoral membrane 

 raised. 



Pteropus medius, ami Pteropus sp? 



The same as P. vulgar-is. In an embryo the transverse bands 

 were as conspicuous as in P. vulgaris.. 



Cynonycteris stramineus. 



One adult and six immature specimens of this species were 

 examined. The lines were much the same as in P. vulgaris. In 

 the third interspace the digital lines appeared from the inter- 



