230 CLASSIFICATION OF FISHES^, ETC. 



and caudal fins covered with scales ; the pectoral and 

 caudal round the ventral pointed ; lateral line inter- 

 rupted; representing Cichla; preoperculum crenated ? 

 A. ocellatus. Spix, pi. 68. 

 ThaUiurus Sw. General structure of Crenilabrus^ but the 

 fins have only a few scales at the base, and the pre- 

 operculum is smooth ; mouth moderate ; long acute 

 cutting teeth at the top of each jaw ; those on the 

 sides short, conic, separate, and obtuse ; dorsal spines 

 furnished with short filaments, as in Labrus ; caudal 

 lunated ; pectoral and ventral pointed and equal ; 

 lateral line interrupted. 



C. Blochii. Bloch, pi. 260. 



Plesiops. Ventral fins excessively long; operculum 

 scaled ; preoperculum smooth ; teeth setaceous, often 

 minute, and very fine ; cutting teeth in front of the 

 jaws either very small or none. 



Labristoma* Sw. Head obtuse; only three of the anterior 

 dorsal rays short and spinous ; the others, both simple 

 and branched, being flexible ; pectoral fin rounded ; 

 ventral pointed and long ; caudal lunated ; lateral 

 line interrupted ; front teeth of the jaws as in Labrus; 

 mouth small, not protractile. 

 L. olivacea, Riipp. ii. pi. 2. fig. 3. flavivertex. ii. pi. 2. fig. 4. 



Chromis CuY. (pars.) Body oval, rather broad; fore- 

 head high ; dorsal fin with strong spines and fila- 

 ments ; pectoral and ventral fins very large, and both 

 of them pointed; caudal lunate ; mouth very small ; 

 teeth setaceous, minute, and hardly perceptible ; 

 without any larger cutting teeth in front. 



C, melanogaster Sw. Bl. Surinamensis Cuv. Bl. pi. 



296. fig. 1. 277. fig. 2. 



Cichlasoma Sw.t General structure of Chromis, but 



the caudal and the large pectoral fins are rounded ; 



* The name of Pseudo-chromis is so objectionable, that I hope the 

 learned naturalist who proposed it will excuse me for offering another. 

 This interesting type obviously represents the Blennides and Labristomus, 

 which implies its resemblance to Labrus. 



f I have been induced to regard this fish as a distinct type ; because, 

 from Bloch's figure, it seems a form which connects Crenilabrus with 

 Cfieilinus, as here restricted : the teeth are very peculiar, and separate it 

 from Chromis, to which, however, it has a resemblance in its pointed an«t 

 rather lengthened ventral. 



