286 PISHES. 



(oo. Semotilus corpomlis with a black spot at the 

 base of the dorsal in front, and 8. hullwris a 

 large species with large scales, have the bar- 

 bel so minute as to be easily overlooked; 

 they may therefore be looked for here.) 



Semotilus, 18. 

 (ooo. Phoxirms margaritm, with small scales, a 

 small, horizontal mouth, and short, rounded 

 head, has the lateral line so nearly com- 

 plete that it may be looked for here.) 



Phoxtnus, 16. 

 nn. Anal basis elongate, of 13 to 15 rays; teeth 

 5 — 5, with grinding surface and the edges cre- 

 nate-serrate ; belly sub-carinate; body deep, 

 much compressed, with small head, small, 

 oblique mouth, and the lateral line greatly 

 decurved ; alimentary canal elongate. 



NOTBMISONUS, 14. 



gg. Lateral line incomplete or wanting. 

 p. Dorsal behind ventrals ; scales very small ; mouth 

 oblique. 

 q. Teeth 4 — 5 or 5 — 5, with grinding surface ; ali- 

 mentary canal elongate. Chkosomus, 15. 

 qq. Teeth 1 or 3, 5 — 4, 1 or 3, without grinding sur- 

 face; alimentary canal short; body short and 



thick Phoxtnus, 16. 



pp. Dorsal over ventrals ; scales large ; teeth 4—5, 



(rarely 4 — 4) with grinding surface ; alimentary 



canal short. . . . HBMrrRBMiA, 17. 



dd. Maxillary provided with a small— often very minute 



—barbel; alimentary canal short; teeth hooked. 



r. Premaxillaries projectile, the skin of the lip separ- 

 ated by a groove from that of the forehead. 



s. Teeth two-rowed, the principal row 4—5, without 

 grinding surface; barbels minute, just above 

 the angle of the mouth ; size large, dorsal fln in- 

 serted more or less backwards. Semotilus, 18. 



