CASINYCTERIS. 



569 



foramen to tip of nasals quite horizontal (in Scotonj/cteris distinctly 

 descending), nnd alveolar margin much more steeply ascending 

 anteriorly, giving the rostrum in jnoOle the appearance of being 

 slightly upturned. FremaxilJjc as in tScotonyckris. Erain-caae in 

 jjrotiJe closely similar to that of Scotonycteris, but rather broader. 

 Po.stdcntal palato (floor of posterior nares) completely obsolete, the 

 posterior narial passage and the mesopterygoid fossa forming one 



Fig. -SO. — Cafivt/cirris argynni^, $, fvpe of species. 

 Shaded ^gures f (linear), outlines \. 



long open fossa extending practically from level of back of m' to 

 level of front of glenoid fossa of squamosal, length of this fossa 

 nearly equal to the whole length of the bony palate from incisive 

 foramina to palation. — a modification of the posterior bony palate 

 unparallpled in other Megnchiroptera (this fossa, it should be noted, 

 is covered belo-vv by the soft palate (]uite as far backward as in the 

 ordinary Megachiropteran Rkull). Free palatal edge Wl-shapied 



