1865.] ON THE MARINE MOLLUSCA OF SOUTH AUSTRALIA. 155 This small and tender but exceedingly beautiful species is gene-rally more or less abraded, but when perfect is easily recognized by the sculpture, which consists of distant, extremely slender riblets, each of which consists of, or is surmounted by, a series of minute granules. A rare variety is striped like the young of A. pelta {J. atrigillata, Nutt.) ; but in general it is more or less mottled, some-times delicately pencilled, like A. fascicularis, Menke, from the Gulf of California. ACM^A SUBUNDULATA, AugaS. A. t. parva, tenui, ovali, altiore ; extus colore 2^(tJiide fiisco-corneo, fusco varie maculata seu strigata, liris radiantihus ob-soletis vix undata ; sfriis incrementi confertissimis ; vertice hand adunco, plus mimisve antico, ad trientem sen ad dicas inter quinque partes longitudinis sito ; intus fuscescente, fusco-nigro varie maculata seu strigata, nitida ; spathula plerumque tenebrosa ; margine haud conspicuo. Long. -52, lat. -4, alt. -22 poll. Hub. Port Lincoln, Hobsou's Bay {Archer'). Var. t. intus pallidiore, strigis radiantibus angustis. Aij\, 7. On THE Marine Molluscan Fauna of the Province of South Australia: with a List of all the Speci\.s KNOWN UP to THK PRESENT TIME; TOGETHER WITH RE-MARKS ON THEIR Habitats and Distribution, etc. By George French Angas, C.M.Z.S. Having paid considerable attention to the marine conchology of South Austraha during a residence of some years in that province, and possessing in my own collection examples of nearly every spe-cies enumerated in the following list, I have endeavoured to work up my materials, however imperfect, into a list of species bond fide in-habitants of that portion of Austraha*. As so many of the earher authors have described shells, giving either an unknown habitat or a wrong locahty, it is of importance that those who, from personal observation, are in a position to do so, should give to the scientific world the benefit of their researches, especially when they are able to correct errors and add to our knowledge of the geographical dis-tribution of species. The province, or colony, of South Australia, properly so called, includes all that indented coast-line extending from the mouth of the Glenelg, near Cape Northumberland, on the south-east, to the head of the Great AustraHan Bight on the north-west, rangino-from 129° to 141° of longitude east from Greenwich, and occupying a belt of latitude between 32° and 38° S, This extent of coast in-cludes the two deep gulfs of Spencer and St. Vincent, Kangaroo * Those species marked with an asterisk (*) are recent additions to science, and are described from the type specimens in my collection. — G. F. A.
On the marine molluscan fauna of the Province of South Australia, with a list of all the species known up to the present time, together with remarks on their habitats and distribution, etc
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