Henn: South American Pceciliid Fishes. 137 



The structure of the anal of the male seems also to differ in the 

 lesser number of segments with ventral hooks in the first prolonged 

 ray and in the absence of spinous or dorsal processes on these seg- 

 ments. The first and second prolonged rays are more clearly separated 

 in M. caiicana. These specific differences in anal structure exist 

 between specimens of the same size. 



Genus LiMiA Poey. 



Limia, Poey, Memorias Cuba, Vol. I, 1855, p. 383; Regan, Proc. Zool. Soc. London, 

 1913, p. 1014. 



Type, Limia cubensis Poey = P(Bcilia vittata Guichenot. 



This genus, while closely related to Pcecilia, Mollienisia, and 

 Lebistes, is distinguished from these genera by the absence of forward- 

 projecting spines on the ventral portion of the segments in the first 

 prolonged ray of the anal. This ray is club-shaped and without 



40 

 Fig. 17. Limia hollandi Henn. Distal end of anal of male. X — . 



No. 4640, Carnegie Museum. Boqueirao, Brazil. 



serrations. The third prolonged ray bears the usual dorsal serrations. 

 In most of the species, but not in the present, there is an antrorse 

 spine on the ventral surface near the extremity of the first prolonged 

 ray. 



The anal of the male is shorter than the head; the ventrals are equal 

 to the head in length and are lancolate in shape. A dermal hood or 

 prepuce occurs near the extremity of the fin. 



This genus includes eight species, seven of which are from Cuba, 

 Haiti, and Jamaica, and one from the mainland at La Guayra, Ven- 

 ezuela. The present new species is from the basin of the Rio San 

 Francisco and neighboring streams of Brazil. 



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