PT.riioTT;?. 4S;j 



9. PLEROTES, A*. AmL 



Type. 



1910. Plerotes, K. Andersen, Ann. * 3Iay. N. H. (8) v. 



p. 97 (;* Jau. lUlO) P. anchiefcae. 



EpomoDhoriis (pt., nee Bctmeft), Seabra, J. Sci. Math. Lisboa, (2) vi. 

 p. 116 (1900). 



Didgnosiff. — A genus of Epomo[)horine bat.s, differing from 

 Eijomops chiefly in the following characters : — Palate excessively 

 broad, all teeth considerably reduced in size, cheek-teeth * (p' and 

 ffij present), lower incisors simple, not bilobed, surface of molars 

 nearly perfectly flattened, with but slight traces of lateral ridges 

 and median groove, interdental and postdental palate-ridges essen- 

 tially alike in shape, interfemoral extremely narrow, calear absent 

 (or rudimentary?), vertical fasciae of me.sopatagium few and broadly 

 spaced. Whitish hair-tufts at anterior and posterior bases of ear- 

 conchs ; external tail absent (or rudimentary ?). General size 

 small, forearm about 50-60 ram. [One species. Range, Benguela.] 



^Icull (fig. 28). — Essentially the Epomops type. Palate unusually 

 broad ; breadth across outer surfaces of crowns of m'-m' more 

 than total length of maxillary tooth-row (c-m') ; postdental palate 

 flattened as in Epomops, not deeply concave posteriorly as in Ep>o- 

 mophorus. Kostrum low and very broad, dorsal profile conspicuously 

 descending postero-anteriorly ; length from front of orbit to tip of 

 nasals more than breadth across lower edges of lachrymal foramina. 

 Premaxillse similar in general shape to those of Epomops, but slanted 

 more strongly anteriorly. Temporal ridges very low down on skull, 

 separated by a space subequal to length of maxillary tooth-row ; 

 parietals therefore more domed than in Epomopjs, postorbital much 

 greater than interorbital width, and occipital region more deflected; 

 postorbital processes short and thin. Tympanies not seen. Rami 

 of mandible extremely low and thin, symph)'sis broad, coronoid low 

 and much sloping, inferior margin of rami deeply concave, condyle 

 below alveolar line. ., .^ , 3 , 1 



Dentition (fig. 28).— !-4-^ P P P ™ ^30, Dentition un- 



1. \ c p, P3 p, m, m^ m3 

 usually weak ; p', p^, and m^ rudimentary ; all other cheek-teeth 

 narrow, twice as long (antero-posteriorly) as broad. 



Upper incisors extremely small, l)arely piercing gum, subequal in 

 size, narrowly and equally spaced, crown indistinctly differentiated, 

 blunt (not acutelj" pointed as in Epomops). Lower incisors small, 

 subequal in size, narrowly spaced, forming a curved row in front of 

 (not between) canines, and with relatively wide diastema between 

 ij and c ; cutting-edge simple, obtuse, with scarcely any indication 

 of the bilobate shape of the lower incisors of Epomops. Upper 

 canines as in Ejjomops, lower canines slanted conspicuously outward; 

 p' subequal iti size to an upper incisor, as high as cingulum of 

 canine, crown obtusely triangular ; p^ as in Epomops. p' and p 

 lower than in Ejiomops, in profile less canine-hke, more obliquely 



2i2 



