SYNOPSIS. 363 



dorsal fin placed on a thin ridge ; spiny rays of the dorsal 

 scarcely distinguishable from the other ; ventral s very 

 small ; lateral line curved over the pectorals ; colour wholly 

 black, the belly lighter. Fin-rays, D. 38 : P. 20 : V. 1 + 5 : 

 A. 22 : C. 17. Cuv. $ Val, ix. p. 254, pi. 269. Holo- 

 centrus niger, Lacepede. Centrolophus niger, Black Perch, 

 Penn. Brit. Zool., iii, p. 351. 



GEN. XXIX. ZEUS. Body oval, compressed, without scales ; 

 mouth very protractile ; dorsals separated by a deep notch, the 

 spines of the anterior portion ending in long filaments ; bran- 

 chiostegous rays seven. 



Sp. 52. Z. faber. The Dory. Greatest depth half the entire 

 length ; tail suddenly contracting before the caudal ; head 

 very large, one-third of the entire length ; spines of the 

 anterior division of 'the dorsal very high, the filaments 

 much longer than the spines; pectorals small and rounded; 

 ventrals large ; caudal rounded at the extremity ; colour 

 yellowish, tinged with olive and leaden grey, with various 

 coloured reflections ; middle of each side with a conspicu- 

 ous black spot of an oval shape. Linn., Cuv. $ Vol., x. 

 p. 6 ; Penn. Brit. Zool., iii. p. 296, pi. 45. 

 GEN. XXX. CAPROS. Body covered with rough scales ; 

 spinous portion of the dorsal without filaments ; no spines at 

 the base of the dorsal and anal fins ; branchiostegous rays six. 

 Sp. 53. C. aper. Boar-fish. Body short and oval, mouth 

 more protractile than in Zeus ; eyes very large ; pectoral 

 pretty long and angular, ventral with one strong spine, the 

 other rays flexible and branched ; tail very narrow, the 

 caudal rounded at the extremity. Fin-rays, D. 9, 24 : 

 P. 14 : V. 1 + 5 : A. 3 + 24 : C. 12. Lacepede, Cuv. $ 

 Val., x. p. 30, pi. 281. Zeus asper, Liwn., Jenyns" 1 Brit. 

 Vert., p. 368. 



GEN. XXXI. LAMPRIS. Body oval and much compressed; 

 dorsal single, elongated, and deeply falcate ; teeth wanting ; 

 sides of the tail carinated ; branchiostegous rays seven. 



Sp. 54. L. guttatus. Opah, or King-fish. Back and sides 

 green with purple and gold reflections; under side yel- 



