I've mentioned Sterba, 2003 before. He seems to me to have a reasonable
approach and excellent illustrations. But to determine the number of valid
species (including formae) covered, I would have to count the number of
bold entries in 8 pages of the index. The only numbers readily available
are 168 pages,1550 illustrations in 62 plates

John

At 06:40 PM 4/9/2004, you wrote:
>>Hi Peter:
>>Well, as Art says it's impossible you get the real answer. You can
>>choose between 57 sps for Zeigler & Porreca (1969), 176 sps. for
>>Petuch & Sargent (1986) or "only" 74 sps. for Tursch & Greifeneder
>>(2001).
>>
>>Who is more reasonable? In the last book you can read a very
>>critical study about the Genus that can convince you (or not). In
>>any case I think that it's a new point of view to consider the
>>characteristics of any shell and particularly the Olive shells.
>
>Petuch is a most incredible splitter. Not reasonable at all, methinks.
>--
>Andrew Grebneff
>Dunedin
>New Zealand
><[log in to unmask]>
>Seashell, Macintosh, VW/Toyota van nut

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