75. CAEANGIB.E TRACHYNOTUS. 441 



695. C. cfirysurus (L.) Gill. 



Greenish above, sides and below golden; caudal peduncle dusky- 

 above; dark opercular and axillary spots; inside of mouth black. Head 

 rather deeper than long; opercles very short; snout short. Mouth very 

 oblique; maxillary reaching anterior margin of eye; eye very large, 

 longer than snout, about 3 in head. Caudal peduncle longer than 

 deep, its diameter less than that of the eye; ventrals very small, fitting 

 into a groove in which the vent is situated; pectorals long, falcate, one- 

 third the length. Head 3f in length; depth 2. D. VIII I, 26; A. 

 II I, 26. Cape Cod to Lower California and India ; common on our 

 South Atlantic coast. 



(Scomber chrysurus Linn. Syst. Nat.: Micropter>/x cliri/surus Giiutlier, ii, 460: Serioln 

 cosmopolita Cuv. & Val. ix, 219: Seriola Moris Holbrook, Ichth. S. C. 1860, 79: Chlor- 

 oscoinbrua cariblccus Grd. Ichth. U. S. Mex. Bound. Surv. 21.) 



225. TRACHYNOTUS Lac<>p6de. 

 Pompanos. 



(Botlirolcemm Holbrook: Doliodon Girard.) 

 (Lac^pfede, Hist. Nat. Poiss. ii, 1800: type Chcetodon glamus Bloch.) 



Body compressed, moderately elevated, the general outline ovate. 

 Caudal peduncle short and rather slender. Abdomen not trenchant, 

 shorter than the anal flu. Head moderately compressed, very blunt, the 

 snout abruptly truncate. Mouth nearly horizontal, the maxillary reach- 

 ing the middle of the eye; premaxillaries protractile; maxillary with- 

 out distinct supplemental bone. Jaws, vomer, and palatines with bands 

 of villiform teeth, which are deciduous with age. Preopercle entire in 

 the adult. Gill-rakers short. Gill-membranes considerably united. 

 Spinous dorsal represented by six rather low spines, which are con- 

 nected by membrane in the young and are free in the adult. In old 

 specimens the spines appear small on account of encroachments of the 

 flesh, and ultimately often disappear. Second dorsal long, elevated in 

 front; anal opposite to it and similar inform and size; two stout, nearly 

 free spines in front of anal, and one connected with the fin, these often dis- 

 appearing with age. Scales small, smooth. Lateral line unarmed, little 

 arched; no caudal keel. "When extremely young the preoperculum is 

 armed at the angle with three large spines, and smaller ones above and 

 below. The spinous dorsal is developed as a perfect fin, and teeth are pres- 

 ent on the jaws and palatine arch. In this stage the species bas never 

 been described by previous naturalists, and consequently has received no 

 name, as the corresponding stage of Naucrates (Nauclerus) has. At an 



