Dear David,

I do not understand your use of the word 'plates'.  The article referenced
by Abbott did not include any plates, figures, or text figures.

Old volumes of The Nautilus can be found at the following url.  They are in
.pdf format, so you need to have Adobe Reader (free download) installed on
your computer first for them to be accessible.

The Nautilus is online in the Biodiversity Heritage Library at:
http://www.biodiversitylibrary.org/bibliography/6170

If you have Adobe Reader and want to go directly to the volume that pertains
to your specific question, you can use the following link to go to the cover
of the volume.  Then, you need to use the navigation tools provided to go to
a specific page.

Volume 63 is at the following url:
http://www.biodiversitylibrary.org/item/34872

Hope this answers your question.

Bill Fenzan
Norfolk, Virginia


----- Original Message -----
From: "David Kirsh" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Sunday, July 05, 2009 1:59 PM
Subject: Re: [CONCH-L] Hydatina physis


> Dear Bill and Harry,
>
> Thanks for steering me through the froth. Are those Nautilus plates
> accessible? I might have missed where to find them.
>
> I am wondering what the mechanism could be for the existence of
> circumtropical shells, not being familiar with the sequence of
> continental drift and the formation of the Central American isthmus.
> Other possibilities would be the survival of veligers around the Cape
> of Good Hope (more likely than Tierra del Fuego, no?) and the
> transport in (even colonial) ship ballast.
>
> Aside from circumtropical shells, there are some conspecific shells
> common to both the eastern Pacific and the west Atlantic.  Terebra
> petiveriana Deshayes, 1857 was originally known from the eastern
> Pacific side of the Americas but was found in Caribbean Colombia and
> also in Venezuela http://jaxshells.org/0212uu.htm. What is the most
> likely explanation?
>
> David Kirsh
> Durham, NC
> where bubble-drinks are gaining a foothold
>
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