ON MOLLUSC A OF THE WEST COAST OF NORTH AMERICA. 521 



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2. Halioth rvfesccm, Swains. (Ditto in Exot. Conch, ed. ii. p. 34.) Galapagos [?J 

 and California. 



4. Cassis \_Malea'] ringens, Swains. ? — 



5. Cassis corruf/ata, Swains. Native of the Galapagos. 

 5. Harpa crenata, Swains. ? — 



8. Strombus granulatus, Swains. ? — 



Exot. Conch. Plate. 



86. Comis jirinceps, Ln.= C. regius, Martini, Lam. (C. P. var. ^., Ln.= C. ehresm.') 



Asiatic Ocean. 

 97 (middle figure). Marginella prunmn, Gmel., Martini= Valuta plumhea, Sol. MS. 



Africa. [The pinched W. Indian form.] 

 182. Cypraa spadicea, Swains., Tilloch's Phil. Mag. vol. Ixi. p. 376. South Seas 



{Maine). 

 80. HaUotis Californiensis, Swains. [Figured with 9 small holes.] 1821. 

 55. Solen amhiguus, Lam. N. America, 1820. [This shell is conspecitic with the 



" S. medius, Alashka,*' of the B. M. Coll. ; ditlering somewhat from the S. 



anibiguus as figured by Delessert. The B. M. locality is perhaps erroneous.] 



24. Valenciennes^ Memoir on Humh. and BovjjI., 1833. — The following 

 notes are from a study of the complete copy in the Libr. Eoy. Coll. Surgeons. 



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221. Donax radiata [=var. of 2). jmndatostriatus, Hani. 1843]. 

 219. Venus succincta \^= Chtofie Califomitnsis, Brod. 1835]. 

 245. Btdimus undatus. [The Caribbean, not the Mexican, type is here figured.] 

 267. HaUotis Californiana \^ = H. rufescens, Swains., not II. L'alifornieiisis, Swains.]. 

 267. (Add) HaUotis interrupta, Val. Tropical America. [The description accords 

 with the young of H. Cracherodii, Leach.] 



277. Cerithium mtisica. [Description accords with C. maculos^im, Kien.] 



278. Cerithium granosum \^= Cerithidea varicosa~\. 



279. Cerithium fragaria \^ = Rhinoclams gemmata, ITds.]. 

 282. Cerithium, varicosum [= Cerithidca raricosa, Sby.]. 



308. Strombus cancellatus. Closely resembles Rostellaria Jissurella, from Grignon. 



[Probably E. Indian.] 

 838. Conus scalaris [= C gradatus (Mawe), Wood's Suppl.]. 

 270. Solarium bicanaUctdatum. Small species, like S. Herberti, Desh. Enc. 



265. Natica Bonplandi. [The figure exactly represents Neverita jjattda, Sby.] 



266. (Add) Natica uber, Val. Cumana. 



317. Purpura semi-imbricata, Lam. [An. s. Vert. vol. x. p. 84, no. 39 ; not since 

 identified from the brief description. Perhaps ^ Cuma costata, Blainv.] 



287. Fusus turris r = i^. Thipetithouarsii, Kien.]. 



290. Fusus Magelfanicus " =Buc. Geverstanum, Pallas, =Murex Peruviajius, Enc. 

 M(5th." 



295. Findajicoides [? = decussata']. 



29.6. Pyrula spirata [? =Rapa, jun.]. 



25. Coqtiille. — All the limpets quoted are South American. 



26. Eschscholtz. — The following observations may be useful to the student : 



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10. Murex ferrugineus [ = Purp. crispata, Chemn., var. ; varices few, scarcely frilled]. 



11. Murex lactuca [ = Purpura crispata, Chemn. j. 



1 1. Murex multicostatus [is not Trophon clathratus, as supposed by Midd. ; but pro- 

 bably = T. Gmmeri. It resembles T. laciniatvm. Mart. (Falkland Is.) on a 

 small scale ; varices coronated, without spiral sculpture]. 



16. Acmcea. [Genus described in the Appendix to Kotzebue's Second Voyage, 188CI 

 p. 350 ; somewhat before Tectura, teste Woodward.] 



18. Acmcea mamiUata. [The 'crowded tubercles' were perhaps due to nullipore.] 



19. Acmcea cassis\\i a northern shell, is perhaps the strongly ribbed var. of pelta- 



but the figure accords best with the Cape Horn species, P. ccnea. Mart.]. 



20. Acmcea digitalis [is perhaps distinct from the variable jJcrsona j but passes into 



it by easy transitions]. 



