Spondylus aucklandicus P. Marshall, 1918
MARSHALL, P. 1918. The Tertiary molluscan fauna of Pakaurangi Point. Kaipara Harbour. Transactions of the Royal Society of New Zealand, 50: 263- 277, pls. 18-22. [p. 271, pl. 21, figs, 2, 2a]
1918 Spondylus aucklandicus P. Marshall, 1918
P. Marshall, 1918, plate 21.
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«Shell of moderate size, only 20 mm. high and 30 mm. long. Strongly inequilateral with a considerable posterior expansion. Hinge-line straight with a typical provinculum. On the left valve the area is small and almost linear. Umbo not prominent. Crural teeth very large and with 2 or 3 crenulations on the dorsal side. Ligament-pit distinct, with a wellmarked ridge on either side. Ornamentation: One or two broad concentric undulations crossed by a number of scaly but not spiny radiating ridges of extremely unequal size. Generally 3 or 4 smaller ribs between the larger ones. The ribs are somewhat irregularly curved, and are continued to the margin, near which they are discernible also en the inner side. On the inner surface, however, they only extend as far as the pallial line.
Two specimens only, one of which is in a very good state of preservation. Type in the Wanganui Museum. . No species of this genus has previously been recorded from the Tertiary deposits of New Zealand, but Professor Woods has lately-recorded a specimen, too imperfect for description, from the Cretaceous rocks of North Canterbury. There is also a very large specimen of Spondylus in the Auckland Museum which is labelled as coming from Hawke's Bay.» PATRICK MARSHALL, 1918
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