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Release 41.00 went live 27th February, 2018 finally fixing the problems of Nov/Dec. I have added SCAPHOPODA and MONOPLACOPHORA, 2 classes which bear similarities to GASTROPODA.

Ceratostoma nuttalli

(Conrad, T.A., 1837) Nuttall's Thorn Purpura/Hornmouth Shell size 35 - 63 mm California, USA - S Baja California, Mexico
Taxonomic Information
open bookPage/Plate
J. Acad. Nat. Sci. PhiladelphiaVol. 7, p 264
Encyclopedia of Marine Gastropodsp 276/12
Shells of the World - Volume 1 (in Japanese)p 40/11
Hamlyn Guide to Shells of the Worldp 168
Collector's guide to Seashells of the Worldp 91/16
Compendium of Seashellsp 142/3.3
Audubon - Field Guide to North American ShellsPl. 30; 512
Murex Shells of the Worldp 114; Pl. 18/14-15
Murex unicornis Reeve, L.A., 1849 : Sea of Cortèz, W Mexico
Purpura nuttallii albescens Dall, W.H., 1919 : S California, USA
Proc. U.S. Nat. Mus.Vol. 56(2295), p 332
Purpura nuttallii albofasciata Dall, W.H., 1919 : S California, USA
Proc. U.S. Nat. Mus.Vol. 56(2295), p 332
cameraImage Acknowledgments
1 Aegean Shells
2 Smithsonian National Museum of Natural History
3 Smithsonian National Museum of Natural History
4 Femorale
5 Mollusc Net Auctions
6 Femorale
7 Carlos Carvalho