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The comparative morphology of the secondary sexual characters of elasmobranch fishes. The claspers, clasper siphons, and clasper glands, together with a dissertation on the Cowper's glands of Homo. Memoir XI

โœ Scribed by W. Harold Leigh-Sharpe

Publisher
John Wiley and Sons
Year
1926
Tongue
English
Weight
468 KB
Volume
42
Category
Article
ISSN
0362-2525

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โœฆ Synopsis

Abstract

The claspers of Centrina are adnate with the pelvic fin and bear a spine as in other Spinacidae. Mustelus canis resembles M. lunulatus rather than M. vulgaris. The claspers of Chiloscyllium end in a pointed spike. Pseudotriakis resembles the Carchariidae. The three North American Atlantic species of the genus Raia are considered, and R. laevis and R. erinacea are placed in the pseudogenus containing R. batis, and a new pseudogenus erected for R. ocellata. A gross and histological account is given of the Cowper's glands of Homo, and they are shown to be homoplastic with clasper glands, similar in structure, arrangement, development, and function.

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Morfologia comparada de 10s caracteres sexuales secundarios de 10s Holoc6falos y peces elasmobranquios-10s ijrganos copuladores, sus sifones y glhndulas. Memoria IV. Chiloscyllium y Pristiurus poseen sifones semejantes a 10s de Scyllium. Los Holockfalos poseen rasgos peculiares y caracteristicos cl