. The fishes of North and Middle America [microform] : a descriptive catalogue of the species of fish-like vertebrates found in the waters of North America, north of the Isthmus of Panama. Fishes; Fishes; Poissons; Poissons. . ^' form, in bands, on the jawH only; tip of lower jaw with a barbel; premaxil- li:?'y protractile. Dorsal tins 2, the first short nud hif;h, of stiff, spine-like branched rays; the second dorsal very long, usually of very low feeble rays, continued to the end of the tail; anal fin similar to the second dorsal, but usually much higher; no caudal fin; ventrals small, subju
. The fishes of North and Middle America [microform] : a descriptive catalogue of the species of fish-like vertebrates found in the waters of North America, north of the Isthmus of Panama. Fishes; Fishes; Poissons; Poissons. . ^' form, in bands, on the jawH only; tip of lower jaw with a barbel; premaxil- li:?'y protractile. Dorsal tins 2, the first short nud hif;h, of stiff, spine-like branched rays; the second dorsal very long, usually of very low feeble rays, continued to the end of the tail; anal fin similar to the second dorsal, but usually much higher; no caudal fin; ventrals small, subjugular, each of about 8 rays. Branchiostogals 6 or 7. Lateral line present. Gills 3^ or 4, a slit behind the fourth. Gill rakers small; gill membranes free or nar- rowly united to the isthmus, usually more or less connected; pseudo- branchia>. Wtinting or rudimentary; pyloric cieca numerous;'air bladder present. Genera 18; species about 50, chiefly of the northern seas, all iu deep water. They differ from the codfishes chiefly in the elongate and degenerate condition of the posterior part of the body. Dr. Gill suc- cinctly defines the group as "Gadoidea with an elongated tail tapering backward and destitute of a caudal fin, postpectoral anus, enlarged sub- orbital bones, inferior mouth, subbrachial ventrals, a distinct anterior dorsal, and a long second dorsal and anal converging on end of ; We here follow Goode & Bean in the general arrangement of the genera of Macrouridw. Some of these can, however, be only provisionally adopted, as the characters of <lentition, form of mouth, and character of the second dorsal spine or ray, are subject to much intergradation. These characters seem much more distinct on paper than they are in fact. Still, most of the genera here adopted will ultimately prove valid. {Maciuridce, Gunther, Oat., 1 v, 390-398,1862.) a. First arch free, without fold of membrane across it; month large; seconil dorsal well dovelo]
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisher, booksubjectfishes
