Abstract

As explained by Mr. E. R. Waite in the Introduction to this Memoir, the object of the Trawling Expedition was primarily the capture of food fishes, biological investigation taking a second place. Except a few of great bulk, the Mollusca, by reason of their small size, escaped the meshes of the trawling net. At two stations only, Nos. 13 and 49, did our colleague succeed in procuring small quantities of the sea bottom. These have yielded most of the material dealt with in the following pages.

Since the "Thetis" reached in water from 20–80 fathoms, a region almost unknown to Australian investigators, it follows naturally that a high percentage of the species taken is new to science. The known species are those which extend upwards to the littoral zone on this coast, or those which frequent shoal water in Tasmania. To the latter apply the law enunciated by Forbes, that "parallels in latitude are equivalent to regions in depth." This truth so amply demonstrated for the northern hemisphere, is here first established for Australian waters.

My acquaintance with Australian Tertiary mollusca is too slight to permit a full comparison, but I am within the mark in stating that the collection here dealt with presents a closer relation to the Tertiary fauna than any recent shells yet examined. Survivors specifically unchanged are Trigonia margaritacea, var. acuticostata, McCoy, Nucula obliqua, Lamarck, Limopsis tenisoni, Ten. Woods, and Sarepta obolella, Tate. The fossil Pecten polymorphoides, Zittel, is hardly to be distinguished...  

 
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Bibliographic Data

Short Form
Hedley, 1902, Aust. Mus. Mem. 4(5): 287–324
Author
Charles Hedley
Year
1902
Title
Scientific results of the trawling expedition of H.M.C.S. "Thetis," off the coast of New South Wales, in February and March, 1898, Part 2: Mollusca. Part I. Brachiopoda and Pelecypoda
Serial Title
Australian Museum Memoir
Volume
4
Issue
5
Start Page
287
End Page
324
DOI
10.3853/j.0067-1967.4.1902.1501
Language
English
Date Published
29 July 1902
Cover Date
29 July 1902
ISSN
0067-1967
CODEN
AUNMA5
Publisher
The Australian Museum
Place Published
Sydney, Australia
Subjects
MOLLUSCA: BRACHIOPODA
Digitized
11 March 2009
Available Online
03 August 2009
Reference Number
1501
EndNote
/Uploads/Journals/16757/1501.enw
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