GENYOROGE. 15 



first has the spots on the back and sides well marked ; the white longitudinal bands on 

 the body, the posterior cross band on the head, and the white of the belly are hardly 

 separated from each other by the black ground-colour. The second specimen has these 

 markings well defined and separate from each other. In the fourth they have almost 

 and in the fifth they have entirely disappeared, so that the fish has become uniformly 

 black. 



The structure of these specimens is identical, except that the serrature of the preeo- 

 perculum becomes more strongly marked, the groove deepens, and the spine of the 

 interoperculum becomes larger with age. 



Zanzibar. Aden. Red Sea. New Guinea. Amboyna. Celebes. 



28. Genyoroge sebae. [97.] 



Seba, iii. 27. 2 ; Russell, pi. 99. 

 Diacope sebae, Cuv. fy Vol. ii. p. 411. 



siamensis, Cuv. § Val. vi. p. 524. 



Genyoroge sebae, Giinth. Fish. i. p. 176. 



Aden. Zanzibar. Mozambique. Coast of India, Seas of Java, Amboyna, Waigiou. 

 Louisiade archipelago. 



29. Genyoroge bengalensis. [28, 342.] 



Sciaena kasmira, Forsk. p. 46. 



Holocentrus bengalensis, Bloch, t. 246. f. 2. 



Labrus octolineatus, Lacep. iv. p. 478, pi. 22. f. 1. 



Diacope octolineata, Cuv. % Val. ii. p. 418, vi. p. 526; Schl. Faun. Japan, p. 12, pi. 6. f. 2. 



Genyoroge bengalensis, Giinth. Fish. i. p. 178. 



Aden. Zanzibar. Red Sea. East-Indian seas. Mauritius. Polynesia. 



30. Genyoroge notata. [235.] 

 Russell, pi. 98. 



Diacope notata, Cuv. $f Val. ii. p. 422. 

 Genyoroge notata, Giinth. Fish. i. p. 181. 



Prof. Kner (Novara, Fische, p. 35) supposes that this species is identical with Meso- 

 prion fuhifiamma, but at the same time thinks it possible that he never saw a true 

 Genyoroge notata. As both species are found on the coast of Zanzibar, we can con- 

 fidently state that they are most distinct species. Besides the difference in the develop- 

 ment of the interopercular knob and the corresponding notch on the operculum, 

 G. notata has the black spot above, while M. fuhifiamma has it on the lateral line ; the 

 former also has the second anal spine longer and stronger than the third, its length 

 being contained twice and a quarter in that of the head, while in the latter it is not 



