. Preliminary report on the fish and fisheries of Ontario [microform]. Fishes; Fisheries; Poissons; Pêche commerciale. Fig. 4.—Jaws and Hyoid Auch uv Catfish, kuom thk sidk. Mx, maxilla ; pmx, premaxilla; pi, palatine ; hmd, hyomandibular; op, operculum ; mpt, metapter goid ; qu, quadrate ; pr, preoparculum ; sop, interoparculum ; d, dentary ; ar, articuli^r ; ii, hypohyal; gh, glossohyal; ch, eratohyal; en, epihyal; br, branchiostegal rays. which is similar in general character to the following gill-arches, but which is altered in form by reason oFits carrying the jaws and the skeleton of the
. Preliminary report on the fish and fisheries of Ontario [microform]. Fishes; Fisheries; Poissons; Pêche commerciale. Fig. 4.—Jaws and Hyoid Auch uv Catfish, kuom thk sidk. Mx, maxilla ; pmx, premaxilla; pi, palatine ; hmd, hyomandibular; op, operculum ; mpt, metapter goid ; qu, quadrate ; pr, preoparculum ; sop, interoparculum ; d, dentary ; ar, articuli^r ; ii, hypohyal; gh, glossohyal; ch, eratohyal; en, epihyal; br, branchiostegal rays. which is similar in general character to the following gill-arches, but which is altered in form by reason oFits carrying the jaws and the skeleton of the gill-cover. Indeed the jaws are regarded as another similar arch in front of that, formed of an upper palato-quadrate and a lower mandibular segment,part of the latter carrying teeth (dentary) and part forming a joint with the quadrate, but all suspended to the skull by tlie hyomandibular, the upper part of the hyoid arch. The lower part of this arch is sub-divided as shown in the tifjure, and forms a bony support for the tongue, while its hinder margin performs, with the attached branchiostegal rays, a similar function for the free part of the gill-cover, these rays being related to it in a manner somewhat similar to that in which the bones of the gill-cover—pre- operculum, operculum proper, and interoperculum (there is no suboperculum in the Cattish)—are related to the hyomandibular part of the Fig. 5.—VisiiERAL Skklkton ov Catfish. H, hyiK)hyal; ch, ceratohyal; eh, epihyal; i, iaterhyal; b', first basibranchial; hb\ cb', eb*, hypo-cerato- and epibranchials of first arch ; o, u;so;^hagus ; ep and hp, epi- and hypopharyngeal tooth plates. The mode in which the skeleton of the gill-arches proper is sub-divided and the relationship to the superior and inferior pharyngecl (epipharyngeal and hypopharyngeal) tooth-plates, may be gathered from fig. 5,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for read
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectfi, booksubjectfishes
