ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 535 



No. 



8. Tellina pura [ = i^/. 31azatlanica,]\va.. Desh., Mns. Cum.]. 



11. Donax Jlexuosus [ = Z'. LamarckH, Desk., iu B. M.]. 



13. GiiofJiodon 7)U'nch'cus [_=G. trigonum, Pet., May 1853]. 



15. lidcfii iindithitu [is distinct from Ilarvtlla elecfans]. 



20. Cordiuni hiteolahrum [*= C. quudrayi;narium, Com*.]. 



21. Cardium cruentatuni \_=:Liocardinni substriatum, Conr.]. 



27. Modiola nitens \_ = M. sid)purpnreiis, Miis. Cum., aud is not fromCal.]. 



26. Adula falcatn. [The locality of Mr. Cuming's specimens has not been con- 

 firmed. For " species," in note, read " specimens."] 



31. Lima tetrica. [The specimens from the Mediterranean, W. Indies, Gulf Cal., 

 and Pacidc Islands were all named L. squamosa by Mr. Cuming-.] 



33. Biilimus vesicalis (nem. preoc.) = .S. svfflaitis, ' Otia,' p. 184. 



40. NaceUa puleacea. [Col. Jewett's specimens appear distinct from N. depicta,HdiS.^ 



41. 2'rochus marcidus. [This shell was called Omphalius Pfoifferi by Mr. Cuming, 



from the resemblance of the figure, in which the umbilicus appears keeled ; 

 but the shell marked ' t3'pe/ answering to the diagnosis, along with ' Chloro- 

 stuma^ ■macidosum, A. Ad., are scarcely varieties of Phorcus pulligo,-^lavtyii. 

 The finest series is in the B. M.] 



43. Livona jncoides [has been heard of, but not seen since the explorations of Col. J. 

 Dr. Gld. still considers the species distinct : among the very dissimilar varieties 

 from the W. Indies (vide suite in B. M.) it would probably not have been 

 singled out as a species, but for the theory of the author]. 



45. Crucibulum Jewettii [should be corruf/atum, P. Z. S.]. 



47. Modulus dorsuosus. [Col. J. now thinks that the supposed Acapulco specimens 

 are W. Indian, =Zew<«CM/am, Cheni. When dead, the forms from the two 

 oceans can hardly be distinguished ; but the aspect of his shells is Caribbeeau.] 



54. Cmius rams [=C'. Califurnicus, lids.]. 



56. Conus jmsillus, Gld. [non Chem. =nux, small var., teste Cuming]. 



57. Oheliscus achates [ = 0. claruhis, A. Ad., 1854]. 



65. ColumbeUa ISta.-Barbaremis [so named to correct the statement that California 



was above the limit of the genus, proves to be a Mexican shell, and was 

 probably obtained at Acapulco. Having been redescribed by lieeve from 

 perfect specimens, it may stand as C. Heevei^. 



66. NitideUa Goiddii. [Not to be confounded with Col. Gouldiana, Agass., which 



is probably Amy da.'] 



67. Fusiis amhustus [is a Californiau species. The type stands in INIus. Cum. as 



F.fragosus, Rve., but does not answer to the diagnosis. The typical /r«//o.«M 

 is marked frae/osus, var. F. ambusfus appears absolutely identical with F. 

 clavatus, Brocchi, Mediterranean. Some of the diagnostic marks are not con- 

 stant in the specimens]. 



Col. Jewett went to Panama, as a private collector, in January 1849, 

 spending ten weeks in that region, including Taboga. This was two years 

 before Prof. Adams's explorations. Thence lie sailed to San Francisco, 

 where he spent four months in exploring the shore for about 50 miles 

 from the head of the bay. After labouring for a week at Monterey, he 

 spent ten weeks at Sta. Barbara and the neighbourhood, thoroughly exploring 

 the coast for fifteen miles as far as Sta. Bonadventura. It was here, at the 

 *' Bincon," after a violent southern storm, that he obtained the specimens of 

 Livona picoides, as well as many other rare species that have not been obtained 

 by any other explorer. " The storm tore up the kelp to such a degree that 

 it formed a bank for many miles on the beach, from 10 to 20 feet broad, and 

 at least 4 feet deep, ilany of the plants were more than 60 feet long and 5 

 inches in diameter, having the appearance of vast cables." Before his return 

 to the east, he also collected at Mazatlan (where he obtained some species 

 not included in the B. M. Catalogue) and at Acapulco. There can be no 

 doubt of the accuracy of the Colonel's observations at the time they were 

 made. Unsurpassed in America as a field-pala^oatologist. possessed of accurate 



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