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eW__YORK SHELL CLUB NOTES No. 245 October 1978 Page 5 
ICZN re: VENUS PENSYLVANICA, CALYPTRAEA STRIATA 
the following opinions (listed by number) have been published re- 
cently by the International Commission on Zoological Nomenclature 
ae Zoological Nomenclature Volume 34, part 3, November 
1977). 
Opinion No. 1095 (p. 150) Venus pensylvanica Linnaeus, 1758: 
esignation under plenary powers as 
type-species of Lucina Bruguiere, 
1797 (Mollusca, Bivalvia). 
Opinion No. 1097 (p.158) paaneeeee striata Say, 1826 (Mollus- 
ca: Gastropoda): validation of. 
Reprinted from CONCHOLOGISTS' NEWSLETTER No. 63, 
December, 1977 (page 58). 
* * * 
Reading Opinion No. 1097 above brought to mind the only time we 
found Calyptraea (or Crucibulum) striata on Long Island -- or any- 
where else, for that matter, although the range is given as "Nova 
Scotia to both sides of Florida." It was on Napeague Beach, not 
far from the eastern tip of Long Island, in late summer of 1956, 
that we found in a drift of shells one specimen of this Cup-and- 
Saucer Limpet, a well-marked Lunatia triseriata, three freshly dead 
Arctic Wedge Clams (Mesodesma arctatum) still with their periostra- 
cum, and a few smooth Astarte castanea in good condition. Hach of 
these species was a real "find" for us and we eagerly planned an- 
other trip to Napeague. But next time the beach was swept clean, 
with not a shell to be found. 
The Cup-and-Saucer Limpets and the Slipper Shells are closely re- 
lated: Each has an inner compartment of shell -- the “cup" in the 
Calyptraea and Crucibulum, and the "shelf" in the Crepidula. In 
THE INVERTEBRATES: Volume VI, Mollusca 1, Hyman, 1967, it is ex- 
Plained that these inner shell structures somewhat take the place 
of the columella found in other univalves as a point of attachment 
of the gastropod to its shell (p.199). The illustration of forms 
of Calyptraea, Crucibulum and Crepidula (Fig. 65, E through L, p. 
160) show only a Crucibulum (auricula?) to have a "cup" with its 
edges entirely free of the base shell. 
It is interesting that the ICZN has validated the name originally 
given to this shell by Thomas Say who described it in the Journal 
of the Philadelphia Academy of Natural Sciences, VoberSy px n216;, 
1826, as Calyptraea (Dispotaea) striata. I could not determine 
when’ or for Nae reason workers transferred Sa dep genus Calyp- 
traea Lamarck 1799 to Crucibulum Schumacher ; appears in 
Gould and Binney, 1870 e on of INVERTEBRATA OF MASSACHUSETTS, as 
Crucibulum. Now it seems to be back in Calyptraea where it started. 
ee ee 
Translations show the names to be descriptive. From the Greek: 
calyptra = a veil, hood; dis = a separation; pot = a vessel or Cup. 
From Patina 2 hanging lam or an earthen pot for 
the Latin: crucibulum a ging Ps ig (on el erated. Wines): 
melting metals; striatus = marked with channe 
auricula = ear (ear-shaped); crepidula = a small sandal. 
Dorothy Raeihle 
SO neal 
