PEISTIPOMA.— DIAGEAMMA. 



127 



spot; a series of round blackish spots at the base of the dorsal fin, 

 between the rays, sometimes with a second series higher up. 



Total length 290 millim. 



West Coast of Africa, from the Senegal to Angola. — Type in Paris 

 Museum. 



M. P. Dclhez (C). 

 W. P. Lowe, Esq. (C). 

 Dr. W. J. Ansorge (().). 

 Mr. J. T. Dalton (C). 



W. A. Forbes, Esq. (P.). 

 G. L. Bates, Esq. (C). 

 Dr. AV. J. Ansorge (C). 



Dr. Jackson (0.) ; 



Hon. W. Rothscliiia (P.). 

 Oapt. Wilverth(0.). 

 K. J. Cunninghanie, Esq. (P.). 

 Dr. W. J. Ansorge (C). 



23-24. Yg. 



Angola. 

 Bengo R., at Qnifan- 

 gondo, Angola. 



2. DIAGEAMMA. 



Cuv. Regne Anim. 2nd ed. ii. p. 176 (1829); Cuv. & Yal. Hist. Poiss. v. p. 290 



(1830); Giinth. Cat. Fish. i. p. 318 (1859); Bouleng. Poiss. Bass. Congo, 



p. 388 (1901). 



Eody oblong, compressed ; scales small or moderately large, ctenoid ; 



lateral line complete. Mouth rather small, protractile, horizontal; 



maxillary folding under the preeorbital ; bands of villiform teeth in the 



jaws ; 4 to 6 pits on the chin ; pr?eoperculum denticulate ; no opercular 



spines. 6 or 7 branchiostegal rays; pseudobranchiae large. Dorsal 



with 9 to U spines, anal with 3. Ventrals a little behind vertical 



of base of ventrals, with a scaly basal process. Vertebrae 26-27 



(11 + 15-16). 



Tropical and subtropical seas, Mediterranean, some species entering 



fresh waters. Two of these are dealt with here : — 



