382 SCOMBRI I ).K. 



series of larger ones on the .sides ; the voraeriiK! ;iu(l ])alarine bones 

 have a continuous band of teeth, narrowest on thv vomer : the 

 tongue is luird, cartilaginous, and destitute of teeth. 



The cleft of the mouth reaches only to the vertical from the nostril ; 

 the eye is small. 



The pectoral is rounded and small, its length being one-ninth of 

 the total : the ventrals are slightly pointed, and, as in all the species 

 of the genus, composed of one spine, hidden in tlie skin, and four 

 soft rays ; they are inserted immediately behind the vertical from the 

 pectoral, which they equal in length ; they can be received in a 

 shallow groove on the abdomen. The distance between the dorsal 

 and the disk is 3| in the length of the latter ; the dorsal is low, and 

 enveloped in a thick membrane. The caudal is truncated when 

 stretched out. The anal is very similar to the dorsal, and its oiigin 

 and termination fall vertically below those of the latter. 



The scales are minute, and can be perceived only by the aid of a 

 magnifier ; they are imbedded in pore-like cavities. 



inches, lines. 

 Total length of the larger specimen .... 23 

 Total length of the smaller specimen .... 7 11 



Height of the body 10 



Width between the pectorals 1 5 



Length of the head 2 



of the disk 8 5 



Breadth of the disk 1 2 



Length of the pectoral and ventral 10| 



Diameter of the eye 2f 



8. Echeneis lineata. 



Echenois liucata, Mchzics, Trans. Linn. Sac. i. 1701, p. 187. tab. 17. f. 1 ; 



Bl. Schn. p. 240. tab. T);}. f. 1 ; Lacep. iii. pp. HO, Kw ; Shaw, Zool. 



iv. p. 211 ; niinth. Ann. 8,- Mar/. Nat Hist. May b^OO, p. 398. 

 tropica, Enphrasen, Nija Ilandl. xii. 1791, p. 317. 



D. 10 1 33. A. 33. 

 Body rather slender. T\\'o M^hitish streaks along each side. 

 Atlantic and Pacific, between the tropics. 



9. Echeneis holbrookii. 



Echeneis albicauda, pt., Dekay, Anc York Fauna, Fishes, p. 307 (not 



Mitch.). 

 ? Echeneis naucrates, Gwichen. Explor. A/i/er. Poiss. p. 111. 

 Echenois lineata, Holbr. Ichth. S. Carol, p. 101. pi. 14. f. 2 (not Menz.). 

 holbrookii, Gunth. Ann. ^- May. Nat. Hist. iNlay 1800, p. 400. 



D. 21 I 35. A. 33. 



The length of the disk is 34 in the total, or twice tlie -n-idth of the 

 body between the pectorals. Mouth rounded, the lower jaw termi- 

 nating in a slightly pointed flaj). Brown : generally a black Ijand, 



