American CichUd Genus Ciclilosomn, cDc. 437 



of praeorbital 13 the diameter of eye. Maxillary scarcely 

 exposed, not nearly extending to below the eye; prae- 

 maxillary processes not extending to above the eye ; mouth 

 small, almost transverse, the lower jaw shorter than the 

 upper; upper jaw Avith about 20 teeth in the outer series, 

 the lateral teeth decreasing in size posteriorly ; lower jaw 

 with a transverse series of about 10 teeth, not continued as a 

 lateral series ; fold of the lower lip not continuous ; cheek 

 with 5 series of scales; 7 gill- rakers on the lower part of 

 anterior arch. Scales 34) ^j 3 between lateral line and base 

 of anterior rays of soft dorsal, those of the thoracic region 

 very small. Dorsal XVllI 12, commencing a little in 

 advance of the axil of pectoral, the spines subcqual from the 

 fifth to the fifteenth, thence increasing to the last, which 

 is ^ the length of head; soft fin, when laid back, extending 

 to base of caudal ; posterior part of spinous dorsal and 

 anterior part of soft fin scaly at the base. Anal YI 9. 

 Pectoral a little shorter than the head, not nearly extending 

 to above the anal ; ventral extending nearly to origin of 

 anal. Caudal truncate. Caudal peduncle a little longer 

 than deep. Olivaceous, Avith a series of 5 dark blotches on 

 the side of the body, the last 2 extending upwards as vertical 

 bars on to the base of the soft dorsal ; a dark spot at the base 

 of caudal ; vertical fins slightly dusky, 

 l^io de Sarabia, Mexico. 



1. (218 mm.) type of the Rio de Sarabia. Dr. A. C. BuUer. 



species. 



Neetroplus. 



Keetroplus, Giintli. Trans. Zoal. Soc. vi. 18G9, p. 409 ; Eigeum. & 

 Brav, Ann. Ac. X. York, vii. 1894, p. 613 ; Jord. & Everm. Bull. U.S. 

 Nat Mus. xlvii. 1898, p. 1-j41. 



Keetroplus (part.;, Pellegr. M6m. Soc. Zool. France, xvi. 1903, p. 245 

 (1904;. 



Differs from Paraneetroplas in that the teeth are not 

 pointed or rounded, but truncate, incisor-like. 

 A single species from Nicaragua. 



Neetroplus nematopus. 



Neetroplus nematojms, Giinth. Trans. Zool. Soc. vi. 1869, p. 470, pi. Ixxiv. 



fig. 4 ; Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1898, p. 1541 ; 



Pellegr. Mem. Soc. Zool. France, xvi. 1903, p. 245 (1901). 

 Neetroplus nicaragtiensis, Gill & Brausford, Proc. Ac. Philad. 1877, 



p. 186. 



Depth of body S^ in the length, length of head 3^. Snout 

 as long as postorbital part of head. Diameter of eye 3^ in 



