2. TRI^NOPS. 123 



Subfam. II. PHYLLORHININiE. 



Toes equal, of two phalanges each ; ilio-pecfcineal spine united by 

 a bony isthmus with a process derived from the antero-inferior 

 surface of the ilium, forming a,large preacetabular foramen *. 



Syii02}sis of Genera. 



a. Horizontal anterior nose-leaf horse- 



shoe-shaped ; metacarpal bone of 

 index finder equal to or scarcely ex- 

 ceeding the metacarpal of the third 

 finger in length. 

 a". Centre of the upper surface of the 

 horseshoe supporting the base of a 

 horizontal crest extending back- 

 wards between and above the nasal 

 apertures. 

 a'". Outer margin of the ear com- 

 mencing near the posterior 



commissure of the eyelids. ... 2. Tri^nops, p. 123. 

 b'". Outer margin of the ear com- 

 mencing at a point distant 

 from and on a much lower 



level than the eye 3. Rhinonyctebis, p. 126. 



b". Centre of the upper surface of the 

 horseshoe uncovered; no horizon- 

 tal crest extending backwards be- 

 tween and above the nasal aper- 

 tures 4. Phyllobhina, p. 127. 



b. Horizontal anterior nose-leaf lobate ; 



metacarpal bone of the index finger 

 very long, extending to the first pha- 

 lanx of the middle finger 5. Ccelops, p. 152. 



2. TRI.ffiNOPS. 



Triaenops, Dobson, Journ. Asiat. Soc. Bang. xl. (1871) p. 455. 



Nose-leaf horseshoe-shaped in front, tridentate behind; horseshoe- 

 shaped portion consisting of two laminae, of which the overlying one 



* The bridge thus formed between the spinous process of the eminentia ilio- 

 pectinea and the antero-inferior spine of the ilium forms the inferior boundary 

 of a large foramen, larger than the obturator opening, which has behind and in 

 a plane slightly inferior to it. This foramen occurs only in the species of Bats 

 included in this subfamily, and has not yet been observed in any other species 

 of mammal. The osseous connecting arch forming its inferior boundary evi- 

 dently greatly strengthens the pelvis (which is so remarkably weak in all Bats); 

 but we do not yet know whether there be any corresponding difference in the 

 habits of the animals possessing this peculiar structure which may require addi- 

 tional strength in the pelvis. 



The Bats of this subfamily are also remarkably characterized by the equal 



