A treatise on zoology . Fio. 413. Syngnathus acits, L. A, left-side view of the anterior region ; B, the left brancliial chamberexposed by the removal of its outer wall; C, enlarged view of a portion of a branchial arch ; D,skeleton of the right lialf of the pectoralgirdle and fin, inner view ; E, portion of the tail—acaudal vertebra is shown behind, and a portion of the notochord is exposed, br, branchiallamella; c, coraco-scapular cartilage; d, cleithrum; , cut opercular wall; , distalcartilage supporting lepidotrich ; e, eye; g, gill; , gill-bar; ; gill-raker; m, mouth; n,nostr
A treatise on zoology . Fio. 413. Syngnathus acits, L. A, left-side view of the anterior region ; B, the left brancliial chamberexposed by the removal of its outer wall; C, enlarged view of a portion of a branchial arch ; D,skeleton of the right lialf of the pectoralgirdle and fin, inner view ; E, portion of the tail—acaudal vertebra is shown behind, and a portion of the notochord is exposed, br, branchiallamella; c, coraco-scapular cartilage; d, cleithrum; , cut opercular wall; , distalcartilage supporting lepidotrich ; e, eye; g, gill; , gill-bar; ; gill-raker; m, mouth; n,nostril; nt, persistent constricted notochord ; op, operculum ; , pectoral lin; pi, bonydermal plate ; r, oth radial; sp, opening of branchial chamber ; r, vertebra. GA S TEROS TEIFORMES 415 processes. The pectoral radials are very small, with a row of distal cartilages(Fig. 413, D). The pelvic fins are absent in the adult, though traces of. Siiiiynulliiiti (icx, Fir,. 414.;, with subcaudal brood-pouch. (Afti-r Giintlifi-.) them appear in the embryo Nerojjhis (Huot [233]). The tail is attenuatedwith a small fin, or it is prehensile and finless {Nero2)his, Hiiypocaminis).The skeleton is to a great extent cartilaginous, and the notochordlargely persistent, though constricted. Thevisceral skeleton is much reduced, and thefour gills are considerably modified. Thelamellae have lost their pectinate character,become less numerous, and acquired arounded shape (Fig. 413, B, C). Thebranchial openings arenaiTowed to small aper-tures dorsally placed (Fig. 413, A). Brood-pouches are generally developer! in the male. Family Syxgnathidae. With a veryelongated body. The pectoral fins have beenlost in Nerophis and Gastrotoceus. The lattercarries its eggs in a soft abdominal mem-brane, and Srjngnathus on its belly withoutpouch; but in others the eggs are canned in pec-toral, abdominal, or subcaudal ventral pouches. Syngnathus, L. (Fig. 414
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishe, booksubjectzoology
