140 Gr. E. Dobson — Osteology of Tricsnops persicus. [No. 2, 



The ribs are very much flattened and separated by very narrow inter- 

 vals. 



The ento-condyloid tuberosity of the humerus develops an exceedingly 

 long styloid process, directed slightly upwards, contrasting with the similar, 

 short, blunt process of Phyllorhina ; the ecto-condyloid tuberosity is obso- 

 lete ; the articular surface is marked with a very deep sigmoid notch. 



The ulva is strongly curved backwards. 



The bones of the fingers exhibit nearly the same relative proportions in 

 length as in Phyllorhina. The terminal phalanx of the third finger only is 

 bifid at the extremity, as in Gcelops Frithii. From the proximal extremity 

 of the same phalanx, close to the joint, on the under surface, and slightly to 

 the outside, a process of bone, 015 inch long, arises, directed downwards, 

 slightly forwards, and outwards. 



The anterior portion of the ilium develops, at right angles to its in- 

 ferior surface, a broad quadrilateral process of bone. The antero-inferior 

 angle of this process is connected by a narrow bony isthmus with the ileo- 

 pectineal spine, thus bridging over the space between, and forming the in- 

 ferior boundary of a large oval opening, larger than the obturator foramen 

 which is placed posterior to it, and, owing to the oblique position of the iliac 

 bones, on a somewhat lower level. The rim of the pelvis thus forms a 

 straight line from the pubic symphysis to the antero-inferior angle of the 

 quadrilateral process on the anterior extremity of the ilium. 



In Ph. larvata, and other species of Phyllorhina, the iliac bones develop 

 very similar processes, but that rising from the antero-inferior surface of the 

 ilium is much narrower, more of a triangular than of a quadrilateral shape* 

 and directed downwards and slightly backwards ; its antero-inferior angle is 

 rounded off, and does not develop any spine, as in Tricenops. 



In Pvhinolophus the eminentia ileo-pectinea develops a long, acutely 

 pointed spine, not connected by bone with the antero-inferior surface of the 

 ilium. 



The fibula is complete as in other Rhinolophine bats. The toes are 

 equal in length, each with two joints, as in Phyllorhina and Gcelops. 



The genera of Rhinolophidce may be arranged, osteologically, under two 

 subfamilies as follows : — 



Subfam. I. RHrsroLOPHiNiE. 



Toes unequal ; outer toe with two, remaining toes with three joints each ; 

 ileo-pectineal spine not connected by bone with the antero-inferior surface of 

 the ilium. 



Genus. 1. Phinolophus. 



Metacarpal bone of fourth finger exceeding that of second finger in 



