Jordan and Evermann. — Fishes of North America. 1541 



vent; outer branchial arch provided with short horny processes; lower 

 pharyngeal broader than long, the lateral halves not firmly united, armed 

 with villilbrm teeth, and with 2 rows of stronger conical teeth along 

 the middle. Reddish-olive, marbled with blackish, the latter color form- 

 ing 7 rather irregular transverse bands, some of which extend on dorsal 

 fin; belly silvery, marbled with blackish; opercles and some scales on body 

 with blue dots. Length 6 inches. Guatemala. (Giinther.) (irregularis, 

 irregular.) 



Theraps irre(jvlaris, Gunther, Cat. Fishes, iv, 284, 1862, Guatemala. (Coll. Salviu.) 

 Herot irregularis, GOnthek, Fishes Ceiitr, Am., 467, pi. 78, fig. 2, 1869. 



6i8. NEETROPLUS, Giinther. 



Xeetroplu.s, GOnther, Fish. Cout. Am., 469, 1869 (nematopus). 



This genus diliers from Heros and Ciclilasoma chiefly in having anteriorly 

 a row of Hat incisor-like teeth, behind which is a band of villiform teeth. 

 Central America, (j'eo?, new; Etroplus, a related genus found in India; 

 y/rpoJ', abdomen ; oitXov, armature). 



a. Dorsal rays XIX, 10; anal rays VIII, 7. nematopus, 1950. 



aa. Dorsal rays XVIII, 11; anal rays VII, 7. nicabaguicnsis, 1951. 



1950. XKETROPLUS NKMATOPIIS, Gunther. 



Head 3| ; depth 21. D. XIX, 10; A. VIII, 7; scales 5Jj-34-12. ' Head as 

 high as long, with an adipose prominence over eye, which renders jirofile of 

 forehead somewhat abrupt ; snout rather compressed and prominent, length 

 of snout I that of head, and more than width of orbit, which is nearly ^ 

 length of head; cleft of mouth small, extending backward somewhat 

 behind vertical from nostril; jaws equal in front; teeth in a band, those 

 of outer series genuine incisors, which appear to be replaced by smaller 

 ones, standing behind in a band; incisors ^^^ preorbital Avider than eye, 

 equal in width to interorbital space, which is convex ; eye at some distance 

 from upper profile, nearer to end of opercle than to that of snout; scales 

 on cheek small, in about .5 oblique series; posterior limb of preoperculum 

 about twice as long as the inferior, and descending obliquelj' forward ; 

 scales on opercles as large as those on neck ; those near base of dorsal and 

 on abdomen very small ; dorsal fin commencing above vertical from hinder 

 margin of operculum; dorsal and anal scaly at base; si^ines rather strong 

 the sixteenth dorsal spine nearly i length of head; soft portions of both 

 fina produced, reaching beyond middle of caudal ; caudal truncated ; pec- 

 toral shorter than head ; outer ray of ventral produced into a filament as 

 long as the fin; fold of lower jaw interrupted in middle; 5 series of scales 

 on cheek. Brownish olive, with irregular darker clouds. Length 4A 

 inches. Lake Managua, Nicaragua. (Giinther,) {v)}jita, thread; Ttov?, 

 foot.) 



Neetroplus nematopus, Gunther, Fish. Centr. Am.,470, pi. 74, fig.4, 18G9, Lake Managua, 

 Nicaragua. (Coll. Capt. Dow.) 



