198 PROCEEDIXGS OF THE NATIONAL MUSEUM. vol.56. 



on trunk by upper lateral keel, tinge of dark greenish. Iris pale. 

 Fins all pale brownish, with dusky on outer portions. 



Length, 450 mm. 



Type.— Cat. No. 42150, U.S.N.M. 



Also four other examples, showing: head, 3 to 3J; depth, 1^ to 

 1^ in postocular region; D. ii, 12, once 11, 14; A. ii, 17; scales about 

 212 to 223 in lateral line to caudal base; about 123 to 135 predorsal 

 scales to occiput; rakers, iii to vi+4 to 6 v to xi; eye 1§ to 2 in 

 postocular; interorbital If to 2; least width of caudal peduncle, 2 

 to 2f ; length, 379 to 429 mm. 



My examples differ from the accounts by Valenciennes ^ and 

 Giinther ^ in the constantly fewer anal rays, or 19 instead of 20 to 

 21, partly pentagonal body, slightly more advanced ventral and 

 apparently larger scales. In structure the scales show the circuli 

 complete, very fine, or simply convergent, 



SCOMBER COLIAS GmeUn. 



' Head, 3| to 3|; depth, 5^ to 6i; D. X— ii, 10 + 5; A. in, 10 + 5; 

 snout, 2f to 3 in head measured from upper jaw tip; eye, 4| to 4J; 

 maxillary, 2f to 2f ; interorbital, 4 to 4^; second dorsal spine, 2 to 

 2iV; first branched dorsal ray, 4| to 4§; pectoral, 21 to 2J; ventral, 

 2f to 2 J; rakers, 16+30. Maxillary about to eye front. Front 

 nostril about three-fifths of eye-diameter before eye. Interorbital 

 flattened. Spinous dorsal inserted about midway between hind 

 nostril and soft dorsal origin. Pectoral about one-fourth to one- 

 third in depressed spinous dorsal. Ventral inserted near first third 

 of depressed pectoral. Two examples, 229 mm. 



TRACHURUS PICTURATUS (Bowdich). 



Head, 3^ to 3^; depth, ^ to 5^; D. VIII— I, 30 to 34; A. II— I, 

 25 to 29; scutes in lateral line, 49 to 56 + 45 to 52, and of latter usually 

 4 to 8 on caudal base; snout, 3 to 3^ in head measured from upper 

 jaw tip; eye, 3 to 3|; maxillary, 2| to 2^; interorbital, 3f to 4; rakers, 

 16 or 17+39 to 41; length, 132 to 205 mm. Fourteen examples. 



Tracliurus traclmrus (Liimaeus), of the Mediterranean, is close 

 to the present species in the broad scutes in the first half of the 

 lateral line, apparently differing in their fewer number, 79 to 86, 

 compared with 94 to 108 in T. picturatus. Both species have far 

 more scutes than T. semispinosus (Nilsson) in which they are said 

 to be 70 to 75. Compared with examples from California (San 

 Pedro and Santa Catalina) of T. symmeiricus the present form shows 

 several strildng differences. It has the lateral line much wider, as 

 width of upper two-thirds and lower three-fifths of eye, compared 

 with width of upper one-half and lower two-thirds in eye in T. 



» Hist. Nat. Poiss., vol. 18, 1846, p. 339. » Cat. Fish. Brit. Mus., vol. 6, 1866, p. 235. 



