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Abstract

The region of the anterior dorsal fin of the elephant-fish (CalZorhinchus callorhynchus (L.) has been examined by dissection, by injection of radio-opaque material and in serial sections. Particular attention has been paid to the venous system in the region.
A large venous sinus lies below the basal plate of the fin skeleton and has connections running anteriorly and posteriorly in the midline. Anteriorly, the sinus is connected with the left posterior cardinal vein by a large communicating vein which lies close against the left side of the vertebral column. This arrangement is generally
similar to that found in the Selachii, but in the latter group two venae circulares are found instead of the median dorsal sinus of Callorhinchus and other Holocephali.

Item Type:	Article
Authors/Creators:	Plomley, NJB and Dilly, N
Keywords:	Tasmania, Hobart, Royal Society of Tasmania, RST, Van Diemens Land, natural history, science, ecology, taxonomy, botany, zoology, geology, geography, papers & proceedings, Australia, UTAS Library
Journal or Publication Title:	Papers and Proceedings of the Royal Society of Tasmania
ISSN:	0080-4703
DOI / ID Number:	https://doi.org/10.26749/rstpp.109.175
Collections:	Royal Society Collection > Papers & Proceedings of the Royal Society of Tasmania
Additional Information:	Copyright Royal Society of Tasmania
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