438 



pteralopex ANCErS. 



cusp not essentially different from that of p' of a Pteropvs, i.e. 

 ridgc-like and constituting inner wall of tooth, not conical and 

 pressed inward ou crushing surface, p^ and m' rather similar m 

 general structure to p''.— Pj, p., and m, less shortened than in Ft. 

 utraia, about one-half longer than broad. A shallow notch in 

 cutting edge of outer main cusp of p^ and m, (fig. -^, C) ; inner 

 main cusps of same teeth more ridge-like, less cusp-like (conical) 



U C' 



rig. 22. — A, upper right, B, lower left tooth-rows of Ttercdvpex anccps (type of 

 species). A', B', corresponding tooth-rows of Pteralopex airata 

 (type of species). C, p4 and lu, of Vt. aiiceps (type). C, corre- 

 sponding teeth oi Ft. airata (89.4.3.1). All figures \ (linear). 



than in atraia.— Upper incisors and canines, outer lower incisor, 

 and lower canines heavier than in atrata (see measurements, p. 441). 

 C'ingulum of i" not raised as a distinct cusp postero-internally. 

 Posterior basal (cingulum) cusp of uj^per canine lower, broader, 

 and more obtuse than in utraia; anterior basal cusp (in single 

 t-kuU examined) indistinct. 



i/rtrs (dried skin). — Concealed in Burrounding long fur; upper 

 margin triangularly rounded off. Clothed with thinly spread long 

 hairs ou both surfaces, from base to tip. 



Far. — Long, directed posteriorly ou back but not adpressed. 



