Zoological Illustrations, Second Series, Volume 2 / or, Original Figures and Descriptions of New, Rare, or Interesting Animals

by William Swainson

VOLUTILITHES pertusa.

Shell subfusiform, and the base striated; the upper part with thick, remote, and somewhat nodulous ribs; traversed near the suture with lines of punctured striæ; inner lip thickened, plaits on the pillar distinct, the last very strong, the two next smaller, and the upper very slender.

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This species is certainly undescribed by Lamarck, nor do we find it in Dr. Fleming's useful compendium of the "Mineral Conchology." Our specimen has the grey tinge of the London clay fossils. Neither of these species are typical; as they represent the recent costated Volutes, in the adjoining group.

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Pl. 54.

MITRANÆ. Pl. 6.
1. Mitrella fusca. 2. ocellata. 3. olivæformis.

MITRELLA fusca.