Collected by Charles Frederick Hartt. 263 



c. Entire edge of maxillary finely denticulate, a few conical teeth 

 near its articulation. Body with silvery longitudinal bands, 

 A . 40, the pectorals extend beyond the root of the ventrals, 



24. artedii. 



cc. Maxillary with only a few rudimentary teeth near its articula- 

 tion. 



d. Body with two dark cross-bands, no longitudinal band. One 

 of the cross-bands extends to the gill opening, the other 

 toward the middle of the pectoral fin, both descending from 

 before the dorsal. A dark caudal spot ; depth not less than half 

 the length, head about one-fourth, A. 40 25. argenteus. 



dd. No dark cross-hands, ventral and anal fins orange-red. 

 Depth three-fifths, head somewhat more than one-fourth. 

 Eye large, A. 40 26. rufipes. 



bb. Scales in the lateral line 37-40, 

 e. A silvery lateral band. 



f. Maxillary denticulate with minute teeth its entire length, elon- 

 gate extending to the middle of the pupil. Humeral spot 

 present, none on the caudal ; the silvery lateral band narrow, 

 dorsal rays prolonged. A. 41, scales 4 or 5-40-6. 



27. pectinatus. 

 ft'. Maxillary not denticulate its entire length. 



g. A small tooth on the maxillary. The round caudal and 

 humeral spot not very distinctly developed. The middle 

 of the caudal fin thickly spotted with dark dots. Head 

 nearly 4, depth about 2^ in the length. Maxillary does not 

 reach the orbit. A. 40-42, scales 6-37 or 38-4, 



28. tabatingae, 

 gg. Several small teeth on the upper fore edge of the maxillary. 



Head 3|, depth 3 or somewhat more, snout 4 in the head. 

 A silvery-gray lateral band bordered above by blue-green. 

 Humeral spot round. Caudal sjjot when present extends 

 to the end of some of the caudal rays, 29. bairdii. 



ggg. Maxillary toothless. 



h. Scales IO-4I or 4.2-9. A small silvery green lateral band. 

 A dark spot on the basis of the caudal, depth half the 

 length. A. 40-41. 30. multiradiatus. 



hh. Scales 7 or 8-4 1-6 or 7, humeral and caudal spot pres- 

 ent, the pectorals extend beyond the origin of the ven- 

 trals, ]\[axillary extends somewhat beyond the front mar- 

 gin of the orbit. A. 38?-41; head 3|-3§ ; depth 2i-2i 



31. caucanus. 

 ee. No lateral band, caudal spot present, no humeral spot, the dor- 

 sal fin distinctly behind the ventrals, the pectorals extend con- 

 siderably beyond the base of the ventrals. Depth about 2|; 

 head 3| in the length. A. 44 ; scales 7-38-7 32. nigripinnis. 



