52 PROCEEDINGS OF THE ACADEMY OF 



Genus Liopropoma Gill. 

 Perca sp. Poey, Memorias sobra la Historia Natural de la isla de Cuba, vol. ii. 



Body slender and subfusiform. Head elongated, conic in profile and ante- 

 riorly acute. Preoperculum entire. Operculum armed with a strong spine. 

 Scales covering the whole head and the bases of the vertical fins. Dorsal 

 fins connected at their bases ; the anterior with six spines, the middle of 

 which are longest ; the second armed with three spines regularly increasing 

 in length. Anal fin with three spines ; the fin increasing in height poste- 

 riorly. Caudal fin ernarginate. Lateral line anteriorly strongly curved. 



A single species is found in the island of Cuba. 



Type. Liopropoma aberrans Gill. 

 Syn. Perca aberrans Poey, Memorias sobra la Historia Natural de la isla de 

 Cuba, vol. ii. p. 125, pi. 12, figs. 2, 3. 



B. 



Pseudobranchiffi absent or rudimentary. Tongue smooth. Teeth villi- 

 forrn. 



Genus Lates Cuv. 

 Perca sp. Gmelin. 

 Centropomus sp Lacepede. 

 Lates Cuv., Regne Animal, ed. i. vol. ii. 



Body oblong-ovate and compressed. Head conical in profile. Preopercu- 

 lum serrated behind, dentated below and armed at its angle with a large 

 horizontal spine. Operculum with one spine. Suborbital bone serrated. 

 Dorsal fins scarcely joined at the base ; the anterior furnished with seven or 

 eight spines. Anal fin with three spines and about eight or nine branched 

 rays. 



The species of Lates have been only found as yet in Egypt and the rivers of 

 the East Indies and China. 



Type. Lates niloticus Cuv. 



Genus Cnidon Miiller and Troschel. 



Cnidon Miiller and Troschel, Horje Ichthyologies, vol. i. p. 21. 



Body elongated. Head conical in profile. Preoperculum serrated behind, 

 entire below and armed at the angle with a strong horizontal spine. Opercu- 

 lum spinous. Suborbital bone nearly entire. Dorsal fins two ; the anterior 

 with seven spines, the second provided with a spine and about thirteen 

 branched rays. Anal fin with three spines and about nine branched rays. 



The only species has been discovered in the Philippine islands. 



Type. Cnidon chinensis Miiller and Troschel. 



Synopsis generum Rhyptici et afflnium. 

 THEODORE GILL, AUCTORE. 



Rhypticus Cuv. 



Rhypticus Cuv. Regne Animal, vol. ii. 



Anthias sp. Bloch. Systema Ictathyologire, Schneid. ed. 



Corpus oblongum, compressum, antice altius. Preoperculum rotundatum, 

 postice spinis crassis duabusarmatnm ; operculum triaculeatum. Pinna dorsalis 

 longa, spinis duabus vel tribus portioni posteriori membrana conjunctis. Pin- 

 na analis spinis carens, vel spina minuta praedita. Pinna caudalisrotundata. 



I. Rhypticus saponaceus Cuv. 



Jabonsillo Parra, Descripcion de deferentes Prezas de Historia Natural, p. 51, 

 pi. 24, fig. 2, 1787. 



[Feb. 



