1884.] NATURAL SCIENCES OF PHILADELPHIA. 131 



dd. Dorsal fin slightly higher than long ; tips of first rays 

 not extending beyond tips of last when the fin is 

 depressed ; teeth small, 

 e. Snout broader than long, the jaws subeqiial ; tail with 

 a slight keel ; scales 3|-60-6. saurus. 5. 



ee. Snout longer than broad, the lower jaw included ; 

 tail without keel. 

 /. Four rows of scales between lateral line and adipose 

 fin (6 in an oblique row); origin of dorsal fin 

 nearer adipose fin than tip of snout ; scales on 

 cheeks in about 4 to 7 rows, on opercles in 4 to 

 6 rows. 



g. Head very small, 4f in length ; first rays of dorsal 

 coterminous with last ray when the fin is 

 depressed ; cheeks with about 4 rows of large 

 scales, opercles with about 4 ; ventrals 1| in 

 head ; pectoral 2 in head ; D. I-IO ; A. 1-12 ; 

 scales 6-61-6. scituliceps. 6. 



gg. Head 4 in length ; tips of first rays of dorsal not 

 reaching tips of last when the fin is depressed ; 

 scales on cheeks in about T rows, on opercles 

 in about 6 rows ; ventrals 2^ in head ; D. I-IO 

 to 11 ; A. I-IO to 11 ; scales 4-64-6. 



foetens. 7. 



ff. Six rows of scales between adipose fin and lateral 



line ; cheeks with about 9 rows of scales, opercles 



with about 8 rows; D. I-IO; A. I-ll; scales 



13-66-16. lucioceps. 8. 



Synodus myops. 



Salmo myops Bloch & Schneider, Systema Ichthyol., 1801, 431 (St. 



Helena). 

 iSawMS m2/<?psCuv!er& Valenciennes, Hist. Nat. Poiss., xxii, 1849, 485 



(South Caiolina, Martinique, Bahia, St. Helena) ; Giinther, Cat. 



Fish. Brit. Mu-*., v, 1864, 398 (Cuba, Jamaica) ; Jordan & Gilbert, 



Syn. F:sh. N. A., 1882, 281. 

 TracMnoceplialus myops Poey, Syn. Pisc. Cub., 1868, 415 (Cuba). 

 Salmo fcetens Bloch., Ichthyologia, about 1790, taf. 384, fig. 2 ; Bloch & 



Scluie'der, Systema Ichthyol., 1801, 404 (not Linnaeus). 

 Osmenis lemniscatus Lacepede, Hi&t. Nat. Poiss., v, 1803, 236 (on a 



drawing by Pluniier). 



