512 Mr. K. Andersen on 



than to Rousettus, but clearly different from both, must be 

 kept in a separate genus. Matschie's definition of Myo- 

 nycteris was, however, based not on the species selected by 

 liira as type of the subgenus, viz. collaris^ but on angolensis ; 

 the diagnosis of the genus as given above is therefore entirely 

 diflferent from that published by Matschie. 



1. Myonycteris collaris. Gray. 



1870. Cympterns collaris, Gray, Cat. Monk. &c. p. 123 ('< W. Africa "). 

 1878. Cynonyeteris torquata, Dobson, Cat. Chir. B. M. p. 76, pi. v. 



fig. 1 (Angola). 

 1889. Cynonyeteris Irachycephala, Socage, Jorn. Sci. Math. Lisboa, 



(2) i. p. 197 (San Thome). 



Forearm 60-67 mm. Wings from back of first phalanx 

 of second toe. 



Range. — From the Congo Basin southward to Angola, 

 north-westward to San Thome, Liberia, and Sierra Leone. 



Type in the British Museum. 



Gray's Cynopterus collaris. — Type locality : '' W. Africa"; 

 the British Museum register for 1843 proves the specimen to 

 have been obtained '■' near Congo." Gray's statement (l. s. c.) 

 that the specimen is " young ^' is incorrect; his quotation of 

 " Gray, List Mamm. B. M. (1843)," where the specimen is 

 stated to have been registered under the name Xantharpyia 

 collaris^ does not refer to the printed text of that book, but to 

 a hand-written addition by Gray in the British Museum copy 

 of the book. Prior to 1870 " collaris "" had not been used as 

 a specific name in the genus Cynopterus ; it is therefore valid, 

 and antedates Cynonyeteris torquata, Dobson. 



Bocage's Cynonyeteris hrachycephala. — Type locality : 

 S. Thome, Gulf of Guinea; type in the Lisbon Museum. 

 From the description (" la premiere premolaire et la derni^re 

 molaire extremement petites aux deux machoires " ; forearm 

 62 mm.) and the figure of the skull and teeth in palate view- 

 clearly a M .collaris. 



General Remarks, 



The Genera. — Rousettus is allied to Pterocyon ; the two 

 genera probably represent diverging branches from one 

 common stem. They accord in most of their important 

 cranial, dental, and external characters ; in both the basi- 

 cranial axis is deflected to practically the same degree. In 

 having the premaxillaries in contact or co-ossified (not sepa- 

 rated), tlie tympanic not produced into a bony auditory 

 meatus, wi not lengthened, and m^ less reduced in size, 



