EIDOLON. 



Teeth without special modifications; no secondary cusps in 

 canines or cheek-teeth. General structure of molars: a median 

 longitudinal groove, flanked by a higher outer and lower inner 

 ridge each ndge rising, or tending to rise, into a cusp in front of 

 middle ot tooth ; in the upper molars the outer ridge representa 



Fig. I.— Eidolon helium, cT. Bilelipi, Fernando Po. No. 4.7.1.15. \. 



cusps 4 and 5 in the typical molar in Insectivorous Bats, the inner 

 ridge cusps 6 and 7 ; in the lower molavs, the inner ridge cusps 

 1-3, the outer ridge cusps 4 and 5. 



Upper incisors small, terete, very nearly equal in size (the outer 

 incisors, if anything, faintly smaller in cross section) ; crown 

 indistinctly differentiated from shaft, subcircular in cross section, 



E 2 



