PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 595 



^^ Scomber cri/sos,^^ the "yellow mackerel," is the Garanx pisquet)is C 

 & v., and not the Gar mix hqypos Linn. The only reason that c;:ii be 

 nrgecl for the identification of '■'■ crysos-' with hippos^ is the depth as- 

 signed to the former (oj in total length), this being- greater than that 

 nsually fonnd in insquetus (3^ to 4 in total). It is to be noted, however, 

 that Mitchill's specimen was only 6.^ inches long, and the young or" all 

 the species of Garanx have the depth appreciably greater than do the 

 adults. Furthermore, Mitchill's measurements, taken as they were in 

 inches, would easily permit the slight inaccuracy necessary to account 

 for this difference in depth. The figure given by Mitchill, if sufficiently 

 accurate to be of value, would seem to be based on a young specimen 

 of hippos. It differs, 'however, too widely from the accompanying de- 

 Hcription to allow us to consider it identical with the specimen used by 

 Mitchill for the type of the species. 



The following characters, given by Mitchill, leave little doubt as to 

 the species he had in mind ; " a neat, compact, handsome fish, about '^ 

 inch thick. He is plump, generally. Back forms a neat regular curve. 

 Belly an opposite corresponding sweep. Head neither rostrated nor 

 blunt." "A black spot frequently at the edge of the gill cover." " D. 

 8, 24, A. 20." These characteristics are exactly those of pisquetus, while 

 hippos, on the contrary, is a high compressed fish, not at all plump, 

 with the back forming a high vmeven curve, and the belly not at all 

 arched, but running in a straight oblique line from chin to front of anal: 

 the head is also blunt, the rostral profile being sub-vertical, and the fin 

 formula is 2d D. 21-22 : A. 16-17. In addition we have the fact, of lit- 

 tle importance, perhaps, that the pisquetus is by far the commoner form 

 northward, and is generally known as the "Yellow Mackerel." 



Garanx chri/sus is the only species of Garanx brought in much abun- 

 dance to the market of Charleston, during the summer months. The 

 name Jaclc-Grevalle is there applied to all species of Caranx without dis- 

 tinction-. 



51. Caranx hippos (Liun.) J. & G, 

 But few specimens seen. 



52. Caranx setipinnis (Mitch.) J. & G. 



Many specimens taken in the harbor are in the Charleston Museum. 

 A single immature example was seen in the market. As has been noticed 

 by Bleeker and Steindachner, this species has the armed lateral line of 

 Garanx, from which genus we do not see how it can be separated. 



53. Selene vomer (Linn.) Liitken. — Hog-fish. 



The young form of this species, with filamentous dorsal and elongate 

 ventrals, was very abundant in the harbor, ^o adults were seen. 



54. Chloroscombrus chrysurus (Linn.) Gill.— Bumper. 

 Very abundant. 



