File:The Danish Ingolf-expedition (1899-1953) (20645380289).jpg

Title: The Danish Ingolf-expedition
Identifier: danishingolfex2apt1a5daniuoft (find matches)
Year: 1899-1953 (1890s)
Authors: Danish Ingolf-Expedition (1895-1896); Københavns universitet. Zoologisk museum
Subjects: Marine animals -- Arctic regions; Scientific expeditions; Arctic regions
Publisher: Copenhagen H. Hagerup
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: MSN

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Text Appearing Before Image:
42 ON THE APPENDICES GENITALES (CLASPERS) IN THE SELACHIANS.
Text Appearing After Image:
Fig. M. iijS'^'" (from the foremost edge of the pelvis to the hindmost point of the appendix the length is 24='")'); the largest breadth is foinid somewhat above the hindmost point of the fin-membrane, and is abont 3,5"^'^. The ventral side is flat, covered with dermal teeth till the naked terminal part (4,3™ long, 2,1'"' at the broadest spot, at the base); these dermal teeth are flat, and form a complete mosaic, only a little rongh to the feeling, wlien rnbbed with the finger towards the base, and it is of qnite the same natnre as that covering the ventral .side of the rest of the fin 2); the whole surrounding of the clo- aca as well as the .space from there to the foremost lateral corner of the fin is naked (with a few scattered groups of teeth); further- more a naked stripe stretches from the hindmost inner edge of the fin-membrane, where the fin is laid against the appendix, some wa\' on the ventral side of the fin. Both edges as well as the whole dorsal side of the appendix are naked. The somewhat triangularh- pointed terminal part shows, when seen from the dorsal side, the appendix-slit (af) situated near the lateral edge; a rather large, foliace- oiis fold of the skin, which includes the skeletal piece Td,, originates from the dorsal lip of the slit; the proximal end of this fold stretches into the (half-) tube formed b\- the distal ends of the marginal cartilages. Accordingly there will, on both sides of this plate, be an outlet from the canal of the glandular bag in the broad part of the appendi.x; the real continuation, howe\'er, of this canal is here, as everywhere, situated in the terminal jjart laterall\- of the said fold (at aj). If the fold is thrown back, there will in the lateral margin of the appendix-slit proper be seen a rather large 1) Miiller & Heiile I.e. p. 99 state in characterising the genus: Die Anhauge des Miinnchen klein und weich , whicli, as we have seen, does not apply to adult animals, and consequently is of no value as a characteristic of the genus. 2) This dental mosaic on the ventral side is quite different from that of the dorsal side, where the dermal teeth project as small thorns from the thicker skin. The words of Muller & Henle in characterising the genus; Schuppen konisch in eine Spitze endigend, zerstreut> are then only to be applied to the dorsal side. I have not upon the whole found any mention made of the dermal teeth of the ventral side, onlj' expressions to the effect that the abdomen is more or less smooth.

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