592 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



front ; teeth ou vomer, palatines, and tongue similar to those in jaws, 

 but much smaller; vomerine patch broad, concave, with two lateral 

 backward processes; on each side of this is the short, narrow palatine 

 baud (wholly lacking in specimens examined of Remora squalipeta,, and 

 Echeneis naucrates) of about 3 irregular series. Eye 3| in head, half 

 width of interorbital space. Disk wide, covering all of top of head, its 

 Avidth 1§ in its length, which is one-fifth total length with caudal ; la- 

 mellae but 10 in number, very strongly pectinate. 



Origin of dorsal midway between base of caudal and third cephalic 

 plate ; the shape of dorsal, anal, and caudal as in Echeneis naucrates^ the 

 median caudal rays being, in our young specimen, produced. Pectoral 

 pointed, the rays all normal, about 18 in number; its tip not quite reach- 

 ing tip of ventral, which is 4 head. 



D. X-30; A. 30. Head 5^ in length ; depth about ^ length of head. 

 Length 4 inches. 



Color, slaty -black, a darker band along middle of sides, bounded above 

 and below with a narrow white streak, the upper beginning on snout, 

 the lower below eye, the two slightly con verging backwards ; under side of 

 head lighter; auterior lobes of dorsal and anal, upper and lower caudal 

 rays, and pectoral fins, broadly margined with white; ventrals and pos- 

 terior dorsal and anal rays with narrow white margins. 



The genus P/i^/imt7ii%s is evidently most nearly related to Echeneis, 

 from which it may be separated, as well by the peculiar dentition as by 

 the reduced number of plates on the head. 



A single small specimen, 4 inches in length, was taken at Charleston. 

 This agrees well with descriptions given by Foey,of Echeneisapicalis and 

 Echeneis siyhyrcenarum, but lias not the conspicuously enlarged teeth in 

 sides of lower jaw, assigned to the latter. 



45. Elacate Canada (Liuu.) Holbrook.—CoWa. 



Not infrequently taken in the summer mouths. A single specimen 

 was obtained. 



46. Trichiunis lepturus Liiiu.— "St(or(?-^8/t"; Silver-eel. 



Very abundant in Charleston Harbor, being brought in by every seine- 

 boat. 



47. Scomber colias (iinelin. 



A single specimen of this species, captured at Charleston in the fall 

 of 1880, was presented by Mr. Chas. C. Leslie. 



The three species of Scombei', known to occur on our coasts, may be 

 thus distinguished. 



a. Air bladder none. 



1. S. SCOMBRUS Linn. 



Sc&mber ■•^combvKS Cnv. tfe Val. ix, G. 



f A^combcr renialh Mitch. Trans. Lit. and Philos. Soc. New York, 1815, 423. 

 Scomber venialig DeKay, N. Y. Fanna, Fishes, 101. 

 SidevS silvery below, immaculate; top of head almost uniformly dark, 

 the cranium without conspicuous transparent area. 



