134 Mr. 0. Thomas on some 



asserted want of a hypocone to the molars ; but although 

 the hypocone is low it appears to me fully as much developed 

 as it is in many specimens of Peropteryx, or, if it is smaller, 

 the difference is only in degree and not in kind. Perhaps 

 Mr. Miller's examination was made before the skulls were as 

 completely cleaned as is now the case. 



The onlv difference between AT t/ropteryx and Cormura that 

 might result in the resuscitation of the former is in the shape 

 of the posterior palate, a point in which none of the specimens 

 I have seen really agree W'ith Peters's plate of Cormura. 

 But the slightest damage to the most delicate part of the tiny 

 skull, or even insufficient cleaning and consequent inexact 

 drawing *, might have resulted in such a figure as is published 

 by Peters, and I am therefore not prepared to consider this 

 point as of sufficient importance to counterbalance the other 

 evidences of identity. 



A specimen of this same bat was obtained on the Rio 

 Inambari, Peru, by the late P. O. Simons, and two others at 

 Para by A. Robert. 



While all the adult specimens of this bat have no basi- 

 sphenoid septum, as figured by Peters, it is worthy of remark 

 that the immature example received from Berlin has a well- 

 marked septum. Whether this is due to youth or is an 

 individual abnormality I am not at present able to say. 



5. Cyttarops alecto, gen. et sp. nn. 



^ . 10. Mocajatuba, near Para, lOtb May, 1912. Coll. 

 F. Lima. P.M. no. 12. 11. 4. 5. Type. 

 " Caught in garden." 



Cyttarops, gen. nov. [EmhaUonuridce — DicUdurince.) 



Colour normal. Tail without terminal modification, its tip 

 just projecting on the upper surface of tlie interfemoral. 

 JSkuil not so highly modified as in Diclidurus, the muzzle 

 not bent upwards ; a frontal cup present, but its boundaries 

 and the junction of its fiioor and walls less sharply angular. 

 Slender postorbital processes present. Palate ending o})posite 

 last molar. Basisplienoid pit barely defined, practically con- 

 tinuous with roof of mesopterj'goid fossa, not divided by a 

 mesial septum. Tibia grooved on plantar aspect, as in 

 Diclidurus. 



Dentition practically as in Diclidurus. Canines without, 

 but incisors with, a supplementary terminal posterior cusp. 



* Possibly worked up from a specimen of Peropteryx. 



