ON MOLLUSCA OF THE WEST COAST OP NORTH AMERICA. 175 



28. The next expedition furnishing results belonging to our present sub- 

 ject of inquiry was the " Voyage to the Pacific and Behring's Straits, per- 

 formed in H.M.S. Blossom, under the command of Capt. F. W. Beechey, 

 R.N., F.R.S. &c, in the years 1825-28." Capt. Beechey was principally 

 assisted in the collection of Mollusca by Lieut. Belcher. Unfortunately it 

 was not at that time thought necessary to mark the locality of specimens ; 

 and for a large proportion we have to depend on general notes or the me- 

 mory of the collectors. Of several very interesting species, however, the 

 locality was carefully preserved. A series of specimens having been pre- 

 sented to the Zoological Society, the new species were described at the 

 request of the Society by Messrs. Broderip and Sowerby in the Zoological 

 Journal, vol. iv. 1829, pp. 359-379, with Latin diagnoses and a plate. As 

 this list is valuable, both from its not being mixed with other collections and 

 from the known accuracy of the writers, it is here presented entire. 



Page. 



359. Nucula arctica; a few sp. in Vatcha Bay, Kamtschatka. PI. 9. f. 1. 



360. Mactra pallida, San Bias. 

 „ Mactra subglobosa. 



361. Corbula rostrata. 



„ Corbula gibbosa ; 1 sp. Icy Cape. Page. PI. Fig. 



„ Solen acutidens, Chinese Sea (Loo Choo) Z.B.V. 153 43 2 



„ Solen tenuis, Northern Ocean. 



362. Solen altus, Northern Ocean. 



„ Tellina Burneti, Mazatlan. PI. 9. f. 2. 



363. Tellina edentula, Behring's Straits „ 154 j \ 2 



„ Tellina alternidentata, Icy Cape „ 153 44 5 



„ Tellina inconspicua, Icy Cape. 2 sp „ 153 41 6 



= T. Groznlandica, Beck, MS. 



„ Tellinides purpureus, Pacific. (Real Llejos, Cuming.) „ 153 42 2 



364. Cytherea rosea, San Bias " 151 43 7 



„ Venus gnidia, San Bias ' 151 41 3 



„ Cyrena Mexicana, Mazatlan. ** In Mr. Sowerby's Coll." 



The type appears to have been lost. 



365. Astarte crassidens, Icy Cape. 1 sp. 



„ Astarte lactea, Icy Cape 152 44 12 



,, Area grandis. 



„ Area gradata, Mazatlan n 152 43 1 



366. Cardium Belcheri; 3 sp. taken north of Isabella Is. in the 



entrance of the Gulf of California, 15 fm. PI. 9. f. 3. 

 „ Cardium radula (resembling C. muricatum). 

 „ Cardium punctulatum. 1 sp. 



367. Cardium Dioneeum, Is. in S. Pacific „ 152 42 6 



„ Cardium graniferum, Mazatlan : 6 inches in mud. 



„ Cardium biangulatum }) 152 42 5 



368. Cardium boreale, Icy Cape. 



„ Chiton albolineatus, Mazatlan „ 149 40 4 



„ Chiton Loochooanus, Loo Choo. 



„ Chiton vestitus, Arctic Ocean „ 150 41 14 



369. Vermetuspellucidus. Probably the young of V. eburneus, Rve. 

 „ Patella Mexicana, Mazatlan. Long. 9 in. 



„ Dentalium semipolitum. (Like D. nebulosum.) 



„ Bulla calyculaia, Pitcairn's Island. 



370. Crepidula incurvata, Kamtschatka. 

 . „ Fissurella Mans, Valparaiso. 



„ Emarginula crenulata. 



young of A. persona, which is sometimes deeply ribbed, sometimes nearly smooth. Both 

 • Philippi and Middeudorff, however, regard it as a well-distinguished species. 



