ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 5385 
. Tellina pura [=M. Mazatlanica, jun. Desh., Mus. Cum. ]. 
11. Donax flexuosus [ =D, Lamarcki, Desh., in B. M.]. 
13. Gnathodon mendicus [= G. trigonum, Pet., May 1853]. 
15. Raéta undulata [is distinct from Harvella elegans}. 
20. Cardium luteolabrum [= C. quadragenarium, Cony. |. 
21. Cardium cruentatum | =Liocardium substriatum, Cony. }. 
27. Modiola nitens [ =M. subpurpureus, Mus. Cum., and is not from Cal. }. 
28, Adula faleata. [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 Pacific Islands were all named LZ. sqguamosa by Mr. Cuming. | 
33. Bulimus vesicalis (nem. preoc.) = B. suffiatus, ‘ Otia,’ p. 184. 
40. Nacellapaleacea. {Col. Jewett’s specimens appear distinct from WV. depicta, Hds. | 
41. Trochus marcidus. [This shell was called Omphalius Pfeifferi by Mr. Cuming, 
from the resemblance of the figure, in which the umbilicus appears keeled ; 
but the shell marked ‘type,’ answering to the diagnusis, along with ‘ Chloro- 
stoma’ maculosum, A. Ad., are scarcely varieties of Phorcus pulligo, Martyn. 
The finest series is in the B. M. 
43, Livona picoides [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 corrugatum, P. Z. S.]. 
47. Modulus dorsuosus. (Col. J. now thinks that the supposed Acapulco specimens 
are W. Indian, =/enticularis, Chem. When dead, the forms from the two 
oceans can hardly be distinguished ; but the aspect of his shells is Caribbzean. ] 
54. Conus ravus [=C. Californicus, Has. }. 
56. Conus pusillus, Gld. [non Chem. =nwzx, small var., teste Cuming]. 
57. Obeliscus achates [ =O. clavulus, A. Ad., 1854]. 
65. Columbella Sta.-Barbarensis [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 Reeve from 
perfect specimens, it may stand as C. Reever’. 
66. Mitrdella Gouldii. eS ot to be confounded with Col. Gouldiana, Agass., which 
is probably Amycela. | 
67. Fusus ambustus [is a Californian species. The type stands in Mus. Cum. as 
F. fragosus, Rve., but does not answer to the diagnosis. The typical fragosus 
is marked fragosus, var. F. ambustus 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 he 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 
“ Rincon,” 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. Many 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-paleontologist, possessed of accurate 
