PROCEEDINGS 



GENERAL MEETINGS FOR SCIENTIFIC BUSINESS 



ZOOLOGICAL SOCIETY OF LONDON 



PAPERS. 



1. The Morphology of the Oyprinodont Fishes of the 

 Subfamily Phallostethinse, with Descriptions of a new 

 Genus and two new Species. By C. Tate Regan, 

 M.A., F.Z.S. 



[Received November 8, 1915 : Read November 23, 1915.] 



(Plates I.-IY.* and Text-figures 1-15.) 



Index. 



MoEPHOLOGT : Page 



Neostethus lanlcesteri, $ 2 



N.lankesteri, $ 4 



N. bicornis 14 



Fhallostethus dunckeri, $ 16 



P. dunckeri, $ 17 



The priapium 20 



Other copulator}' organs of fishes 23 



Phtsioxogt: Use of the priapium 22 



Development — of the priapium oi Neostethus bicornis 14 



Systematic : 



Neostethus lankesteri, gen. et sp. n 2 



N. bicornis, STp. n 14 



Rank and position of the Phallostethinse 23 



Evolution — Origin of skeletal elements 24 



1. Introduction. 



In 1913 I described an extraordinary little Oyprinodont fish 

 from Johore, and named it Fhallostethus dunckeri (Regan, 11). 

 Some more fishes from the same locality have been sent to me 



* For explanation of the Plates see p. 25. 



Proc. Zool. Soc. — 1916, No. I. 1 



