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:
52 ON THE APPENDICES GENITALES (CLASPERS) IN THE SELACHIANS. more, and that the M. extensor is single. The glandnlar body is prolonged into the shaft qnite as in Torpedo. Rhinubalidcv. Rhinobatus columnae Bonap. (I'l.III, fig. 35-37-) In a specimen of the total length of 85,5™ and a breadth of 26^™ across the pectorals the appendix had a length of 11,5'"". The other measures were: from the fore end of the slit to the hindmost point of the appendix 7,4^'" the part free of the fin 6,2'='" Length of the terminal part i)9'"" Breadth - - — - 0,8"^™ The appendix reminds of that in Torpedo^ being flat, and having (on the ventral side) the terminal part marked off by a slight constriction; but it is considerably longer, with a long free portion, and a relatively .short terminal part, and so it has a rather slender, elegant appearance. The ventral side is all covered with the same dense mosaic of fine, flat' dermal teeth as the other parts of the belly; onl\- the very outmost point (I""™) is naked and soft. On the dorsal side the region around the fore- most part of the appendix-slit is naked as well as the whole part before the slit, which is normally in contact with the belh-, this having also a corresponding naked spot; furthermore the naked part stretches as a small stripe backward close to the medial edge until the terminal part, the dorsal side of which is quite naked; otherwise the dorsal side is co- vered with teeth, and has the darker colour of the back of the animal. The appendix-slit is situated quite close to the lateral edge, only in the terminal part it bends towards the middle. On the dorsal side of the terminal part are seen two •:^marginal-slits leading into pockets, quite corresponding to those in Torpedo and Xarciiie; the medial one is the longer; in the lateral one the outermost part of the piece T^ is seen freely protruding from the skin as a shining thorn. The skeleton. Between the basale and the appendix-slit are found four pieces: b^^ i5,, b^^ b^\ the last one being the longest, next to that follows b^ which is also tlie broadest, but they are all more long than broad; b,^ and b^ bear no rays, b^ bears the last ray, b^ the last but one (and, in connection with the basale, also the last but two). Tlie piece /9 is exceed- ingly long; anteriorly it articulates with the dorsal side of 1^1 close to the basale, then it stretches
Text Appearing After Image:
Fig. 22. Rhinohaius columnm. The left appendage from the dorsal side. Natural size. F the fin-membrane. F the opening o'f the lateral pocket, / of the medial one.

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