5. CORYNOPOMA. 287 



5. CORYNOPOMA. 



Stevardia, Corynopoma, et Nematopoma, Gill, Ann. Lye. Nat. Hist. 

 New York, 1858, p. 422. 



Dorsal fin placed behind the middle of the length of the body, 

 above the anal ; adipose fin none ; ventrals small. Body subfusi- 

 form, compressed, covered with scales of moderate size ; cleft of the 

 mouth wide, with the lower jaw projecting beyond the upper. Cheeks 

 covered with the enlarged infraorbital bones ; operculum more or less 

 extended, armed with a spine or terminating in a process. Teeth 

 compressed, with multicuspid crowns, the median cusps being the 

 largest, in two series in the intermaxillaries, and in a single one in 

 the mandible ; palate toothless. Air-bladder ? ; gill-openings ? 



Trinidad. 



1. Corynopoma albipinne. 



Stevardia albipinnis, Gill, I. c. p. 425. 



D. 10. A. 20. V. 6. P. 10. L.lat.40. 



Operculum with a triangular spiniform dilatation behind. The 

 dorsal fin commences above the seventh or eighth ray of the anal, 

 and is about a third higher than long. Yellowish green, with a 

 black line along the side of the tail ; fins white. (Gill.) 



Trinidad. 



2. Corynopoma riisei. 

 Gill, I. c. p. 426. 



D.8. A. 27. Y. 6. P. 10. 



Operculum with a posterior triangular dilatation, from the ex- 

 tremity of which issues a claviform process, which is most slender at 

 the posterior third of its length and slightly deflected in the direc- 

 tion of the vent ; it advances but little beyond the base of the pec- 

 toral. Dorsal fin more than twice as high as long ; the last two or 

 three anal rays longer than those which immediately precede them. 

 Coloration similar to that of the preceding species. (Gill.) 



Trinidad. 



3. Corynopoma veedonii. 



GUI, I. c. p. 427. 



D. 9. A. 31. Y. 6. P. 10. 



Operculum with a posterior triangular dilatation, from the ex- 

 tremity of which issues a claviform process which descends at the 

 base only, and very soon advances upwards with a curve, and is con- 

 tinued in a nearly straight line, and in a direction towards the ante- 

 rior portion of the dorsal ; it terminates above the base of the ven- 

 trals. Dorsal fin more than twice as high as long ; the last three or 

 four anal rays longer than those which immediately precede them. 

 Coloration as in the preceding species. (GUI.) 



Trinidad. 



