1. PLEsiops. 363 



Second Group : Nandiua. 



PseudobranchifB none. Ventral rays five. Palatine and vomerino 

 teeth. (Nandoidei, Bleek.) 



Freshwater fishes of the East Indies. 



None of the bones of tlie liead are serrated 3. Badis, p. 367. 



The prwoperculum only is serrated 4. N andus, p. 367. 



Praeoperculum and praorbital serrated ...../. 5. Catopra, p. 368. 



Third Group : Achamina. 



Pseudobranchiae hidden. Ventral rays five. No teeth on the palate. 

 Freshwater fishes from Tropical America. 



Bones of the head not armed 6. Achahnes, p. 369. 



First Group. PLESIOPINA. 

 ]. PLESIOPS. 



Plesiops, Cm: Regne Anim. ; Mull. Sf Trosch. Hor. Ichthyol. iii. p. 22. 

 Pharopteryx, Riipp. Atl. Fische, p. 15. 



Body compressed, oblong, covered with scales of moderate size ; 

 lateral line interrupted. Mouth moderately protractile. Eleven or 

 twelve spines in the dorsal fin, three in the anal ; V. 1/4. The first 

 ventral ray is elongate, bifid. Small teeth in the jaws, on the vomer 

 and the palatine bones. None of the bones of the head serrated. 

 Six branchiostegals ; four giUs, pseudobranchiae ; an air-bladder. 

 Pyloric appendages none. 



Carnivorous fishes from the Red Sea and the East Indian Archi- 



1 . Plesiops nigricans. 



Pharopteryx nigricans, J?(V)j/). Atl. Fische, p. 15. taf. 4. fig. 2, and N. W, 

 Fische, p. 5. 



D.f. A.|. V.1/4. 



The height of the body equals the length of the head, and is two- 

 sevenths of the total. The maxillary extends behind the orbit. 

 Uniform greenish-black ; bluish dots on the opercles, fins, and on the 

 lower part of the sides. 



Red Sea. 



This and the two foUowdng species are, according to Dr. v. Blocker, 

 perhaps only varieties of one, with which opinion I fuUy concur. 



2. Plesiops caeruleo-lineatus. 



Plesiops cperuleo-lineatus, Riqyp. N. W. Fische, p. 5. taf. 2. tig. 6; 



Bleek. Amhoina, iii. p. 116. 

 melas, Bleek. Verhand. Batav. Genootsch. xxii., Bali, p. 9. 



B. 6. D. '■^. A. f- V. 1/4. L. lat. 23. 



The height of the body is contained four or five times in tlie total 



