Henn: South American Poeciliid Fishes. 135 



These agree in all respects with typical specimens of Lebistes reticidatus 

 from Barbadoes. 



Genus Mollienisia Le Sueur. 



MolUenisia Le Sueur, Journ. Acad. Nat. Sc. Phila. II. 1821, p. 3; Regan, Proc. 

 Zool. Soc. London, 1913, p. loio. 



This genus is very closely related to Pcecilia, from which it differs 

 in having an obtuse downward point at the end of the first prolonged 

 ray of the anal and another segment, directed dorsally, as in Lebistes 

 at the tip of the fourth prolonged ray. The chief difference between 

 PcBcilia and Mollienisia is the longer dorsal in the latter. Pcecilia, 

 Mollienisia, and Lebistes might be considered members of the single 

 comprehensive genus, Pa'cilia. 



Fig. 15. Mollienisia laiipinna Le Sueur. Distal end of anal of male. X — . 



I 



No. 9201, I. U. M. Baldwin Lodge, Mississippi. 



The anal of the male is shorter than the head and slightly more than 

 one-fifth of the total length. The ventrals are set close to the anal; 

 the second ray, or the ray next the outer one, is prolonged into a club- 

 shaped filament, which is almost as long as the anal and extends to or 

 beyond the middle of that organ. The ventral part of the tip of the 

 fin has a prepuce or dermal hood as in Pcecilia and Lebistes. 



Type of the genus M. laiipinna Le Sueur. 



