OTOLITHUS.— PSETTUS. 119 



2. OTOLITHUS MAC'ROGNATHUS. 

 Pseiulotolitlms macroipuithus, Bloek. Nat. Voi'li. Ges. Huarloiu, xviii. 18G3, no. 2, 



p. 61, pi. xiii. tig. 2. 

 Otolitlms macrognatluis, tSteinJ. Sitzb. Ak. Wieii, Ix. i. 18C9, p. 690, pi. vii. 



Very closely allied to the preceding, but depth of body about 3.i 

 times in total length, upper profile very convex between snout and 

 dorsal fin, and eye larger, as long as snout in adult, exceeding 

 interocular width, and 31 (young) to 5 times in length of head. Dorsals 

 X, I 25-26. 



'J'otal length 280 millim. 



Senegal to Congo. — Type in Leyden Museum. 



1-i- Ad. ,St. Louis, Senegal. M. P. Delhez (0 ) 



^•- «kel. 



^- ^^g- Banana, Low. Congo. Brussels Museum (E.). 



Fam. 5. SCOKPIDIDJi;. 



Aberrant Perciform fishes with subocular shelf, with teeth on the 

 palate, separate lower pharyngeal bones, gill-membranes free from 

 isthmus, 6 or 7 branchiostegal rays, and two nostrils on each side, as in 

 the Serranidae, but ribs all sessile, inserted behind the transverse processes 

 when these are present. Spinous dorsal more or less developed, some- 

 times much reduced ; anal with 3 spines. Ventrals, if well developed, 

 with 1 spine and 5 soft rays, sometimes rudimentary or absent. 



Coasts of Africa, Southern Asia, and Australasia. Represented in the 

 fresh waters of Africa by the aberrant genus Psettus, three species of 

 ^^hich are known to enter rivers. 



1. PSETTUS. 



Cuv. & Val. Hist. Poiss. vii. p. 240 (1831) ; Gunth. Cat. Fish. ii. p. 48G (1860) ; 



Klnnz, Verb, zool.-bot. Ges. Wien, xx. LS70, p. 7!);?. 

 Monodactylus (non Klein), Lacep. Hist. Poiss. iii. p. 131 (1802). 

 Centropodus^ Laccp. t. c. p. 303. 



Acanthopodus, part., Lacep. op. cit. iv. p. 557 (1802). 

 Stromatoidea, Casteln, Mem. Poiss. Afr. Austr. p. 44 (1861). 



Body very deep and strongly compressed ; scales very small, ctenoid ; 

 lateral line complete. Mouth moderately large, protractile ; maxillary 

 exposed; villiform teeth in jaws and on vomer, palatines, and tongue; 



