316 PROCEEDINGS OF THE ACADEMY OF [1889. 



dinal line, which begins at a point 22mm. from carpus and extends 

 to a point 10mm. from the free margin of the membrane. The pre- 

 digital nerve appears at the middle of the fifth metacarpal bone, and 

 is larger than the postdigital which appears at the metacarpo- 

 phalangeal joint of the third finger. 



The third interspace is provided with a longitudinal line as in the 

 fourth. This line extends from near the palm and reaches to within 

 10mm. of the free margin of the membrane. A nerve appears at 

 the metacarpophalangeal joint of the fourth finger and lies obliquely 

 across the lower part of the interspace. 



The fourth phalanx of the third digit is sickle-shaped, the mem- 

 brane extending from its tip ; that of the fourth digit is of the shape 

 of an inverted T ; that of the fifth finger is triangular, the angle, 

 which is directed toward the body, being prolonged. 



Centurio senex. 



Centurio is remarkable for the system of unpigmented spaces in the 

 mesopatagium near the radio-metacarpal angle and in having the 

 fourth interspace entirely occupied by these transversely arranged 

 spaces. No nerves appear in any position of this interspace. In 

 other respects the membranes are as in other Phyllostomidse. 



Carollia. 



In Carollia the lines are essentially of the same type as in Artib- 

 eus and need not be described. 



Varapyrus spectrum. 



The prebrachium with several obliquely placed lines which pass 

 upward and forward from the forearm. 



In this form the longitudinal lines of the third and fourth inter- 

 spaces are much the same as in Artibeus. The predigital nerve of 

 the fourth interspace is small and appears directly above the meta- 

 carpo-phalangeal joint. A well-defined tendon is seen lying parallel 

 to the first digit of the fifth finger. The postdigital arises from the 

 metacarpo-phalangeal joint of the fourth finger. An homologous 

 arrangement of nerves is seen in the third interspace. In the inter- 

 femoral membrane an oblique line (pubo-tibial) extends from pelvis 

 to the middle of the tibia and an axial line in the center the entire 

 length of the interfemoral membrane. A line passes from the knee 

 obliquely downward and outward and is apparently one of the 

 intercostal series ; but there is none passing upward and outward from 



