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Abstract

The only species of the section Vola, inhabiting New
Zealand-waters, is generally known under Gray's name of
P. laticostatus, to which is referred P. Novae Zelandiae, Reeve,
as a synonym; but neither names should be employed,
inasmuch as the first is pre-occupied by a Lamarckian species
fossil in Pliocene Strata in Italy, and the second by another
New Zeahtnd species, established by Gray.
Eastern Australia, Tasmania, and South Australia have
each a species of Vola, which has been confounded with that
belonging to New Zealand.
The specific differences between these species may now be
detailed as follows: -
P. LATICOSTATUS is distinguished by its broad, flat, smooth
ribs with perpendicular sides, two and one-third times broader
than the flat furrows.
P. MERIDIONALIS has the ribs convexly depressed, concentrically
lamellose, and with 1, 3, or more radial sulcations;
the furrows are concave, and as wide or a little wider than
the ribs.

Item Type:	Article
Authors/Creators:	Tate, Ralph
Keywords:	Royal Society of Tasmania, Van Diemens Land, VDL, Hobart Town, natural sciences, proceedings, records
Journal or Publication Title:	Papers and Proceedings of the Royal Society of Tasmania
ISSN:	0080-4703
Collections:	Royal Society Collection > Papers & Proceedings of the Royal Society of Tasmania
Additional Information:	In 1843 the Horticultural and Botanical Society of Van Diemen's Land was founded and became the Royal Society of Van Diemen's Land for Horticulture, Botany, and the Advancement of Science in 1844. In 1855 its name changed to Royal Society of Tasmania for Horticulture, Botany, and the Advancement of Science. In 1911 the name was shortened to Royal Society of Tasmania.
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