1008 JIR. C. TATE BEGAX ON 



Para. 



Here described from the tj^pes of P. heteristia, J and 5 j each 

 35 mm. in total length. 



The intromittent organ is very like that of P. vivipara, but the 

 anterior branch of the second ray has fewer segments, as in 

 P. picta. 



24. Lebistes Filippi, 1861. 



Arch. Zool, Anat. Fisiol. i. p. 69. 



Acconihophacehts Eigenmann, Proc. U.S. Nat, Mus. xxxii. 1907, 

 p. 426, fig. 1. 



Differs from PceciUa only in that the third prolonged anal 

 ray of the male has its last segments modified into a pair of 

 projections which are directed obliquely outwards and towai-ds 

 the base of the fin. 



A single species from South America. 



Lebistes rbtioulatus. (Text-fig. 173 D.) 



Pcecilia reticulata Peters, Monatsb. Akad. Berlin, 1859, p. 412 ; 

 Garman, Mem. Mus. Comp. Zool. xix. 1895, p. 458. 



Lebistes paicilioides Filippi, Arch. Zool. Anat. Fisiol. i. 1861, 

 p. 69, pi. iv. f. 6 ; Giinth. Cat. Fish. vi. p. 356 (1866). 



Girardinus reticiolatus Giinth. t. c. p. 352. 



Girardinus giippi/i Giinth. t. c. p. 353 ; Regan, Proc. Zool. Soc. 

 1906, p. 390, pi. xxii. figs. 1,1a. 



Acanthopkacelus reticulatus Eigenm. Proc. XT.S. Nat. Mus. 

 xxxii. 1907, p. 426, f. 1 ; Mem. Carnegie Mus. v. 1912, p. 458, 

 pi. Ixv. figs. 1-3. 



Acanthopkacelus melanzomts (part.) Eigenm. Mem. Carnegie 

 Mus. V. 1912, p. 457, pi. Ixiv. fig. 5. 



§ , Depth of body 3 to 4 in the length, length of head 3| to 4^. 

 Diameter of eye 3 to 3| in length of head, interorbital width 1|- 

 to 2. 26 to 28 scales in a longitudinal series. Dorsal 7-8, 

 rounded or obtuse ; origin equidistant from eye or operculum and 

 base of caudal. Anal 9-10, pointed ; origin below or a little in 

 advance of that of dorsal. Pectoral 4 length of head ; pelvics ex- 

 tending to origin of anal. Least depth of caudal peduncle ^ to | 

 length of head. Olivaceous ; edges of scales darker, forming a 

 network ; fins immaculate, except sometimes a small dark spot on 

 middle of caudal. 



(S . Dorsal more elevated than in $ , when laid back nearly 

 reaching base of caudal fin ; pelvics nearly as long as the short 

 intromittent organ. Coloration very variable ; often a blackish 

 spot above or behind base of pectoral, another above anal fin or 

 on middle of side, a third at base of caudal peduncle ; often also 

 several bluish-silvery spots, which may unite to form a lateral 

 band, mai-gined above and below by dark longitudinal stripes ; 

 dorsal and caudal sometimes spotted, often dark-edged. 



Venezuela and St. Lucia to Santos. 



