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 villiform 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 irreyiilaris, (Ji/NTiiKit, Cat. Fishes, iv, 284, 1862, Guatemala. (Coll. Salvin.) 

 llerotirrcijvlaris, Gi'NTiiKi:, Fishes Centr, Am., 467, pi. 78, fig. 2, 1869. 



618. NEETROPLUS, Giinther. 



\<'<'fr<>pltix, (IfNTHKK, Fish. Cent. Am., 469, 1869 (nematopus). 



This genus differs from Heros and Cichlasoma chiefly in having anteriorly 

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

 Central America. (VEO$, new; Etroplns, a related genus found in India; 

 rjrpov, abdomen; oiC\ov t armature). 



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



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



1950. NKET110PLUS NEMATOPUS, Giinther. 



Head 3 ; depth 2|. D. XIX, 10; A. VIII, 7; scales 5^-34-12. Head as 

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

 forehead somewhat abrupt ; snout rather compressed and prominent, length 

 of snout | 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 wider 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 obliquely 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 ; spines rather strong^ 

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

 fins 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 4 

 inches. Lake Managua, Nicaragua. (Giinther,) (rtfjua, thread; rtovg, 

 foot.) 



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

 Nicaragua. (Coll. Capt. Dow.) 



