36 THE PROCEEDINGS OF THE LINNEAN SOCIETY 



In the serration of the prseoperculum, and the number of the 

 anal rays, this fish differs from the generic characters given of 

 the genus Trochocopus by Dr. Gunther, but in other respects it so 

 closely answers to it that I have not thought it necessary to form 

 a new genus for its reception. 



7. — Olistherops brunneus. pi. V, fig. 1. 



D 17/10, A 11, L. lat. about 56. 



Head entirely naked, the operculum terminating over the 

 pectoral fin in a triangular skinny flap ; second ray of pectorals 

 reaching as far as the sixth dorsal spine ; tail crescent shaped, 

 the two outer rays elongate ; height of the body one fifth of the 

 total length ; length of the head the same ; broad and flat 

 between the eyes ; colour almost uniform olive brown. Length 

 13 inches. 



Found in Port Jackson. 



8. — Heteroscarus castelnaui. pi. V, fig. 2. 



D 14/9, A 3/11, L. lat. 36. 



Height of body one-third of total length ; head scaleless, pitted, 

 covered with small pores, and roundly pointed at the snout ; a 

 few large scales on the posterior part of the operculum ; upper jaw 

 protuding over the lower ; praeoperculum finely serrated ; the first 

 four dorsal spines longest, and terminating in a filament, but not 

 so long as in Heteroscarus filamentosus Casteln ; soft dorsal 

 and anal fins, enveloped at their base in a scaley sheath ; tail 

 slightly emarginate ; colour in spirits yellowish with some 

 brownish patches; there are three narrow blue lines on the head — 

 one from the back of the eye to the angle of the operculum, 

 another below the eye in the same direction, and the third from 

 the mouth to the angle of the praeoperculum ; the soft dorsal and 

 anal fins are spotted. Length 8 inches. 



Taken in Port Jackson. 



I have named this species after the founder of the genus, and 

 the most distinguished of our naturalists — the Count de Castelnau. 



Family CLUPEIDvE. 

 9. — Etkumeus Jacksoniensis. PI. IV. fig. 1. 

 B. 15, D. 16, A. 13. 



