Z2i Mr. C. T. Regan on the Fishes of the 



Pomnihfasciatus, Schomb. Fisli. Guiana, ii. p. 1(59, pi. xvii. (1843). 

 Iluplarchus jJentacwnthns, Kaup, Arch. Nat. LSGO, p. 129, pi. tI. fig. 1. 

 Acara (Jleros) jjsittactis, Steind. Sitzb. Ak. Wien, Ixxi. 1875, p. 87, 



Depth of body about 2 in the length, length of head 

 about 2|. Diameter of eye 3-4 in the length of head and 

 nearly equal to the intcrorbital width. Depth of praeorbital 

 equal to diameter of eye. Maxillary not extending to below 

 the eye; fold of the lower li|) continuous; cheek with 10-14 

 series of scales ; 7 gill-rakers on the lower part of anterior 

 arch. Scales 44-48 (probably more if counted above the 

 lateral line) ^q. Dorsal XV 12-13, the spines increasing 

 in length to the last, which is i the length of head. Anal 

 V 8-10. Pectoral nearly as long as the head. Caudal 

 rounded. Caudal peduncle deeper than long. Yellowish or 

 reddish, with a dark longitudinal band from eye to base of 

 caudal, where it forms a spot. 



R. Amazon ; R. Orinoco. 



Heckel's type measures 130 mm. in total length. 



Parapetenia, subgen. nov. 



Typically with larger, more oblique and more protractile 

 mouth than in other groups of CicMosoma and usually w ith 

 maxillary more distinctly exposed distally ; but none of these 

 features are constant. Upper jaw with the anterior pair of 

 teeth Slightly enlarged in the more generalized forms, strongly 

 enlarged in the more specialized ones. Lower jaw with the 

 3 anterior teeth on each side more or less canine-like, with 

 the anterior pair scmewhat smaller than the others (corre- 

 sponding to the enlargement of the anterior pair in the upper 

 jaw) in the more generalized forms. The anterior pair 

 wanting, the next pair strong, and the third pair forming 

 very strong canines in the more specialized forms. Scales 

 of lateral line of the same size as those below it on the side 

 of the body ; scales of the thoracic region much smaller than 

 those on the side of the body. Dorsal XV-XIX 8-13 ; 

 posterior part of spinous dorsal and soft fin with a scaly 

 sheath at the base and wdth short series of scales on tl e 

 interradial membranes. Anal IV-X 7-10. Caudal rounded 

 or subtruncate. 



48. Cichlosoma adspersum. 



Acara atlspcrsa, Giintb. Cat. Fish. iv'. p. 282 (1862). 

 lleros adspersus, Pellegr. Mem. Soc. Zool. France, xvi. 1903, p. 227 

 (1904). 



Depth of body 2? in the length, length of head 2;^. Snout 



