CASJNrCTKRIS. 



571 



and serrate, thus both in characters and position forming a transi- 

 tion to the postdental sj'stem oF ridges. — The onl}- essential 

 difference from Scotonyderis ajipears to be the much larger number 

 of postdental ridges. 



Fig. 45. — Palutc-ridges of C<if,iiii/clcrU avgijnnis (type of species). 

 I (linear). 



External characters. — Similar in all respects to those of Sroio- 

 nycteris (tail rudimentary, not connected with interfeir.oral, inter- 

 femonil well-developed in centre and lateral!}', membranes from 

 middle of first pliaianx of first toe), except for the presence of 

 ■whitish hairs at anterior base of ears, as in all Epomophorine genera 

 except Scotonycteris. "NVing-indices (upper row in table below) 

 csseutiallj' as iu Scotonycteris (lower row), but the pollex perhaps 

 not lengthened quite to the same degree. 



Affiniiies. — If the single species of this genus were known onl\- 

 from its external appearance, it would unhesitatingly be considered 

 a Scotonycteris, diifering from /S. zeiikert in nothing but its larger 

 size, relatively larger ears, and small white ear-])atches : so extra- 

 ordinary is its resemblance in all external features to >S'. zenlcerl, 

 even in the general colour of the fur and the very peculiar white 

 markings of the bead (the only parallel to these markings i.o. 

 curiously enough, found in the Pteropine bat Styloctenium ivallacei 

 and tlie related Pteropas pe.ysonatus ; tlie median patch on the 

 rostrum of Scotonycteris and Oadriycteris corresponding to the 

 median stripe in Siylocteniam, the patch at the posterior canthus of 

 the eye to a similar patch in Styioctenitnn rallier more above the 

 eye, iu Ft. personatas above and beliind the eye, and the white 

 edging of the upper lip being practically quite alike in Scotonycteris, 

 Casiaycteris, and the two Pteropine tiats). Jii the characters of 

 the incisors and canines, the peculiarly bhort-and-broad, subcircular 



