474 



CONTRIBUTION TO THE 



This species is nearest the 0. rupeitrie, Poey and 6, maerophthalmus, Gth., judging by the descriptions. From 

 the former it differs in not having the head .25 in length, nor a suddenly descending muzzle profile, nor six teeth on 

 each side of each jaw, nor 20 pectoral radii, and in coloration. From the latter, which it resembles in color, it differs 

 in not having the origin of the dorsal fin, two-fifth of its distance from the snout, in not having four short incisors on 

 each side the lower jaw, separated by a canine-like tooth from the conical lateral, etc. 



From St. Martin's, W. I. Dr. R. E. van Rijgerfima's collection. 



Epilasmict. 



Chu todonlidtp. 



Sabothbodus skmentabius, Poey Mem. 11., 208. Clwstodon gracilis, Giinthev. Catal. Ii. Mus. 11., 20. 



St. Martin's, Dr. R. E. van Kijgersma. 



Sakotiihodus cafistbatxts, Linn, Cuv. Val. (Ghaitodon) VI I. (!4, Gtinther II., 12. 



St. Martin's, Dr. Rijgersma; St. Croix, Thos. Davidson and Dr. Griffith. 



Sauotiikodiis isimaculatus, Bloch. Cuv. Val. VII. , 07, Giinther II., 9. (Ohmtodon). 



St. Croix, Capt. Thos. Davidson, Dr. R. E. Griffith. 



Sabothbodus stbiatos, Linn. (ChcBtodon) Cuv. Val. VII., 10, Giinther II., 8. 



St. Croix, Thos. Davidson, Dr. R. E. Griffith. 



Holacanthus CILIARIS, Linn. (CAcetodon). Lacepodo, Cuv. Val. VII., 151, Giinther II., 40. 



St. Martin's, Dr. R. E. Rijgersma ; St Croix, R. E. Griffith ; New Providence, Dr. II. C. Wood. 



HOLACANTHTJS TBICOLOB, Bloch. (Chwtodon) Cuv. Val. VII., 162, Giinther II., 49. 



St. Martins, Dr. Rijgersma ; St. Kitts, B. H. Lightfoot ; St. Croix, Capt. Davidson and Dr. Griffith. 



PoMACKNTRUH CJCINCjUECINCTUS, ClIV. Val. VII., 210. 



St. Kitts, B. F. Lightfoot; St. Martin's, Dr. Rijgersma; St. Croix, Dr. Griffith. 



Acanthuridie. 



A.CANTHUBDS CHIBDBSUS, Bloch. Cuv. Val. X., 1G8 ; Giinther Catal. III., 829. 



St. Croix, Capt. Davidson, Dr. Griffith ; New Providence, Dr. H. C. Wood ; St. Kitts, 15. [I. Lightfoot. 



ACAKTHUBTJS CCEBULECS, HI. Schn. Cuv. Val. X., 179 ; Giinther Catal. 886. 



St. Croix, Dr. Griffith, ('apt. Davidson; New Providence, Dr. II. C. Wood. 



TI.RCTOGNATril. 



Osiraciitlir. 



Ostbacicm ijuADuicoiiNK, Linn., llollard Monogr. Ostracionides Am. Be. Nat., 1857, 148. Poey Repertoire, 

 1808, 4.19. 



St. Martin's, Dr. Kijgersma; St. Croix, Capt. Davidson ; New Providence, Dr. Wood. 



OfiXRACIUM TiuaoNUM, Linn., llollard 1. c., 150. 



St. Martin's, Dr. R, E. van Rijgersma. 



OsTRACITJM BICAUDALB, Linn., llollard 1. C, 15; Poey 1. e., 1808, 442. 



St. Martin's, Dr. Rijgersma. 



OsTRACrUM TBIQU1TBUM, Linn., llollard 1. c, 154 ; Poey 1. c, 442. 



St. Croix, Capt. Davidson ; St. Martin's Dr. Rijgersma ; Vera Cruz, Dr. Burroughs ; Brazil, Win. Hyde. 



OSTRAOIUM P^XI'ANSUM. Cope Sp. 110V. 



General character of O. bicaudale L., that is, trigonal in section, witli a horn on each side of the vent, on the 

 the basi-lateral angle. The body is short and elevated, the dorsal line rising into a hump, and descending to the base 

 of the caudal peduncle at an angle of 45°. On the upper side of the base of the latter, a separate bony shield exists, 



