. A junior course of practical zoology. Zoology. 216 THE DOG-FISH d. The pectoral fin has three basal cartilages, the pro- pterygiiim,meso-pterygiiim,andmeta-pterygium, articulating with the three facets on the pectoral girdle. Of these the pro-pterygium is the smallest, and the meta-pterygium, which extends along the inner or attached border of the fin, and corresponds. Pig. 48.—Scyllium canicula. The pectoral girdle and fins of a male specimen, seen from the ventral surface. In the right fin the car- tilaginous skeleton is shown, in the left the muscles and horny dermal fibres, (a. m. m.) A,
. A junior course of practical zoology. Zoology. 216 THE DOG-FISH d. The pectoral fin has three basal cartilages, the pro- pterygiiim,meso-pterygiiim,andmeta-pterygium, articulating with the three facets on the pectoral girdle. Of these the pro-pterygium is the smallest, and the meta-pterygium, which extends along the inner or attached border of the fin, and corresponds. Pig. 48.—Scyllium canicula. The pectoral girdle and fins of a male specimen, seen from the ventral surface. In the right fin the car- tilaginous skeleton is shown, in the left the muscles and horny dermal fibres, (a. m. m.) A, pro-pterygium. AF, pro-pterygjal fln-ray. B, meso-pterygium. BI", meso-pterygial flu-ray. C, meta-pteryglum. CF, meta-pterygial fln-ray. E, polygonal cartilagiuons plate. H, horny fibres. M, muscles ol fin. PG, ventral portion of pectoral girdle. FCf, dorsal portion of pectoral girdle. to the basi-pterygium of the pelvic fin, is much the largest. Prom the outer borders of the basal cartilages a series of close-set cartilaginous fin-rays diverge: of these the pro-pterygium supports a single large one J the meso-pterygium also supports one, which is, however, split distally into two or three; while. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marshall, A. Milnes (Arthur Milnes), 1852-1893; Hurst, C. Herbert (Charles Herbert), 1856?-1898, joint author. London, Smith, Elder
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1888
