Jordan and Evermann. Fishes of North America. 1447 



c. Eye large, 3J in head; snout projecting beyond the small mouth, the 

 maxillary 2J in head ; preopercle with numerous spines. D. X-I, 22. 



TYPICUS, 1830. 



cc. Eye small, 4 to 4| in head; snout little projecting; mouth wider, the 

 maxillary 3^ in head, preopercle with 4 to 6 spines. 



STEABO, 1831. 

 aa. Caudal fin irregularly double truncate, much shorter than the head ; soft dorsal 



with 24 to 26 rays. . 



e. Snout much projecting beyond the premaxillaries; head blunt, somewhat 

 spongy; body rather deep, compressed; the back considerably ele- 

 vated. Color uniform dull brownish without dark streaks. 

 /. Pectorals 1J in head; maxillary 3* iii head; head less depressed, 

 everywhere rounded. SIMULUS, 1832. 



/. Pectorals almost as long as head; maxillary 3 in head; head low and 

 small. IMICEPS, 1833. 



ee. Snout scarcely projecting beyond the premaxillaries ; head not very slen- 

 der; body robust; profile steep; back and sides with conspicuous 

 blackish streaks along the rows of scales; maxillary 3 in head; cau- 

 dal Ig in head; pectorals 1; fins dusky. SCIERUS, 1834. 



SlGMURUS (ovy/ua, Sigma; ovpa, tail): 



II. Caudal f- shaped, the acute upper angle much produced, longer than median rays. 

 Teeth in lower jaw unequal, a series of larger ones being present besides those 

 of the villiform band; body with distinct dark streaks; fins dusky. Second 

 anal spine strong, 2 in head. D. X-I, 25. VERMICULARIS, 1835. 



Subgenus OPHIOSCION. 

 1829. OPHIOSCION ADUSTUS (Agassiz). 



Head 3f ; depth 3*. D. XI-I, 22; A. II, 7; scales 51 (pores); eye 3 in 

 head; snout -U ; maxillary 3^; preorhital about as broad as eye. Body 

 compressed, of moderate depth, the head low, subconic, acutish, but 

 blunted at tip of snout. Snout rather long, projecting, its usual pores 

 and slits well developed; eye rather small; mouth small, inferior, hori- 

 zontal, the maxillary reaching to opposite posterior edge of pupil. Lower 

 teeth equal, in a broadish band; upper teeth with the outer row a little 

 enlarged; interorbital width 3 in head. Preopercle with vertical limb 

 and rounded angle with about 8 rather strong teeth. Gill rakers very 

 short, thicker than high. Scales regularly placed, those below lateral 

 line in horizontal series; lateral line becoming straight before anal. Dor 

 sal spines stout, the longest 1* in head; longest soft rays 3; second 

 anal spine short and very stout, 2 in head. Pectoral long, 1 in head. 

 Color soiled brassy, a faint small dark spot on each scale of back and 

 sides, these forming dusky streaks along each row of scales; fins all 

 dark, with dark points, the pectorals, veiitrals, and anal darkest. West 

 Indies to coast of Brazil. Here described from No. 22417, M. C. Z., 

 7 inches long, collected at Pernambuco by Rev. J. C. Fletcher. Two other 

 specimens examined by us, one from Jerdmie, Hayti (D. X-I, 23), and 

 another (1031, M. C. Z.) from Fonteboa, Brazil. This specimen, with its 

 co-types from Jereinie and Fonteboa, was referred by Jordan & Eigen- 

 mann (Rev. Sciam., 403, 1889) to Scmna adusta, Agassiz. This determi- 

 nation is apparently correct. It is, however, not the species called Scicena 

 adusta by Eigenmann, Ann. N. Y. Ac. 1894, 631, which is the young of 



