218 



SIXTH REPORT — 1836. 



Fam. PLKURONECTOIDEiE. 



Platessa plana, Mitch. iV. York. 



„ stellata, Pall. Polar s. S. of 



Kamtsch. 

 „ dentata, L. A^. York, Schcepf. 

 „ americana, Schcepf. Rhode Is. 

 „ melanogaster, Mitch. A''. York. 

 „ ohlonga, Id. do. 

 Hippoglosmis communis'^, Bl. 47. A''. York. 

 Mass. Sm. Pacif. Eschscholtz. 



Rhombus argus, Cat. 27. Bafiamas. U.St. 



„ glacialis, Pall. Awatska. Polar s. 



„ maxitmis*, Smith, Massach. 



„ aguosus, Mitch. N. York. 

 Solea vulgaris*, Penn. Massach. Smith. 

 Achirus lineatus, Sloane, 346, Carib. *. 

 N. York. Mitch. 



„ plagiurus, L. Carib. s. — Carol. 



Fam. Discoboli. 



Cgclopterus lumpits*, Bl. 90. N. York.- 

 Greenl. Eur. 

 „ minutus. Pall. Mass. Smith.- 

 Greenl. Ross. 



Cgclopterus spinosus, Fabr. Greenl. 



„ ventricosus,P Ai,h. S. oj" Kamtsch. 

 Liparis communis*, Artedi, Eur. Polar s. 



„ gelatinosus, Pall. S. of Kamtsch. 



Fam. ECHENEIDE^. 



Echeneis remora*, Bl. 172. N. York. Mass. Eeheneis species aUce, U. S. Pacif. Benn. 

 Pacif. 

 „ naucrates*, Id. 171. Massach. 

 Newf. Pacif. 



Malacopterygii sub-brachiales. — Most of the fish of this 

 order feed on or near the bottom, and a very considerable num- 

 ber of the species are common to both sides of the Atlantic, par- 

 ticularly in the higher latitudes, where they abound. It does 

 not appear that their general diffusion ought to be attributed to 

 migration from their native haunts, but rather that in this respect 

 they are analogous to the owls, which, though mostly stationary 

 birds, yet include a greater proportion of species common to the 

 Old and New Worlds than even the most migratory families. Se- 

 veral of the scomberoidece which feed on the surface have been 

 previously noted as traversing many degrees of longitude in the 

 Atlantic, but the existence of the ground- feedhig gadoidees in 

 very distant localities must be attributed to a different cause, as 

 it is not probable that any of them wander out of soundings, or 

 ever approach the mid-seas. 



Gadoidece. — About twenty-one species of this family frequent 

 the European seas, most of which, and all the generic forms, have 

 been enumerated by authors as existing also on the North Ame- 

 rican coast. More exact comparisons will probably diminish 

 the number of species supposed to be common to the two coun- 

 tries, but still a sufficient number will remain to justify the pre- 

 ceding remarks. 



Pleuronectoidece. — Upwards of thirty- six species of flat-fish 

 belong to Europe, two or three of which, and all the generic 

 forms, except monochir, occur in the lists of American ichthyo- 



