762 Bulletin -^7, United States National Museum. 



f. Back transversely concave, the sides of the body also concave; the 



angles very sharp; dorsal rays 40 to 44, the fin on 1 + 83^ rings; 



rings about 17+41; snout strongly keeled. carinatvm, 1111. 



£'. Back transversely convex, the lateral faces of body flat or convex, the 



angles blunt. 



(J. Kings 20 to 21 +4") or 49; top of head not keeled; snout long; 



size large; dorsal rays 39 to 46 on 1 j- 9 rings. 



CALIFOUNIENSE, 1112. 



gg. Rings 18 or 19 + 39 to 42; snout shorter, slightly keeled; dorsal 

 .SG to 41, on 1 + 9 rings. gki.seolineatum, 1113. 



ee. Dorsal covering at)out G or 7 caudal rings, rarely fewer. 

 h. Body rings 16 to 20. 



i. Caudal rings 30 to 41. 



j. Dorsal rays 30 to 32; snout 2 or less in head; head somewhat 



keeled in young. lei'Torhynchvm, 1114. 



jj. Dorsal rays 37, on 1 + 7 rings; rings 20 +41; snout moderate, 



13^ in head. fistulatum, 1115. 



a. Caudal rings 31 to 34. 



li. Dorsal rays 34; rings 18 + 31; snout short; body stout; tail 

 short. babbar,t;, 1116. 



U: Dorsal rays 27 to 31. 



/. Snout moderate, 1% to 2 in head; dorsal on 2 + 6 rings. 



mackayi, 1117. 

 n. Snout long, IV3 in bead; dorsal on 1 | 7 rays, rarely on 

 2 + 6. FLOElDyp., 1118. 



in. Caudal rings 24; bodj' rings 19; dorsal rays .30, on 1 + 6 rings; 

 snout long; body slender. poeyi, 1119. 



/)/(. Body rings 15; caudal rings 38; dorsal rays 29 to 30; top of head dis- 

 tinctly keeled; snout short. auliscis, 1120. 

 eee. Dorsal covering 4 or 5 body rings. 

 m. Dorsal rays 24 to 32. 



n. Dorsal rays 29 to 32, on 1 + 9 rings; rings 17 + 35; snout 2 in 



head; head with keel. pelagicum, 1121. 



nn. Dorsal rays 26 to 28, on l]/i, + 5 rings; rings IG to 34; snout short, 



2 in head; head with slight keel. rousseau, 1122. 



nnn. Dorsal rays 24 or 25, on about 1 + 4 rings; rings usually 16 + 33; 



snout short, 2 in head. elucexs,* 1123. 



mm. Dorsal very short, 18 rays, on 1 + 5 rings; rings 17 + 32; snout short. 



JOKESI, 1124. 

 eeee. Dorsal very short, covering 3 caudal rings, and \}4^ body rings; its rays 

 20 to 23; rings 17 + 27; snout very short; head keeled above. 



BRACHYCEPHALUM, 1125. 



dd. Dorsal covering 3 body and 4 to 6 caudal rings, 

 o. Kings 16 or 17 + 29 to 32. 



p. Snout rather short, not half length of bead; dorsal fin very high; rings 

 18 + 33; dorsal 35, on 5 + 4 rings; belly iu female with a black 

 keel; sides with narrow vertical silvery streaks; dorsal spotted. 



AFFINE, 1126. 

 yp. Snout rather long, more than half head. 



'/. Rings 18 + 31 to 34; dorsal 30 to 34, on 3 + 5 rings. 



SCOVELI.I, 1127. 



'///. Rings 17 + 31; dorsal rays 30, on 3 + 6 rings; head little keeled 



above. hairdianum, 1128. 



oo. Rings 20 to 21 + 36 to .38; dorsal 32 to 37, on 3 + 5 rings; belly flat or 



slightly concave; snout moderate. louI8ian.i:, 1129. 



000. Rings 16 to 20 + 36 to 40; dorsal 36 to 40, on 5 + 4 or 4 + 5 rings. 



FUSCUM, 1130. 

 * Including .rtai'iVosire, picturalum, linea, mamtoreum, and ancendens. 



