1889.] NATURAL SCIENCES OF PHILADELPHIA. 323 



from the dorsal space defined on the one side by the femur and 

 proximal half of the tibia and on the other by the pelvo-tibial line. 

 In the male the membrane is generally more hairy and the space 

 defined is covered as is the rest. 



Rhinopoma microphyllum. 



The endopatagium and mesopatagium with numerous vertically 

 disposed bands extending well up in radiometacarpal angle. Inter- 

 costo-humeral line inconspicuous. Internal-cutaneous with two very 

 long slender superior-oblique lines one of which reaches the radio- 

 metacarpal angle. Muscle-mass without oblique folds. The fourth 

 interspace with conspicuous predigital nerve which appears at the 

 middle of the fifth metacarpal bone. The postdigitals are four in 

 number, — the lowest is also the largest and appears at the distal 

 fourth of the fourth metacarpal bone. The third interspace with 

 three very small predigitals from the first phalanx of the fourth 

 digit, and a single postdigital from the metacarpophalangeal joint 

 of the third. Tips to the terminal digits apparently absent. 



The general resemblance of these characters with those of Tapho- 

 zous is striking. The chief contrast is the apparent absence of 

 the postdigitals in the fourth interspace. 



Taphozous mauritianus. (?) 



Prebrachium with middle crescentic portion a's in Saccojiteryx 

 and a nerve is seen in the membrane near the wrist. The angle of 

 the elbow occupied by a thicker sharply-limited membrane than 

 elsewhere. 



Endopatagium with 20 oblique lines of the intercostal series, the 

 lowest not the largest. * The intercosto-humeral is axillary, simple, 

 undivided. It reaches the line of the elbow only near the margin 

 of the membrane. 



The internal-cutaneous line with three vertical lines from the 

 horizontal portion, four superior oblique lines, the main line ending 

 near the end of the fifth digit. The oblique lines on membrane 

 sixty-seven in number and extend well up towards the radiocarpal 

 angle. 



A set of lines distinct from the foregoing occupy the region of the 

 elbow. They are continuous in part with the intercosto-humeral 

 line, and in part are attached to the forearm at the elbow. The meso- 

 patagium near the phalanges of the fifth finger retains a number of 

 delicate lines which appear to be different from those already named. 



The radiometacarpal angle occupied by a deep duplicature of 



