ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 527 



brief diagnosis. Tlie name should therefore be dropped. The shell, pi. 19, 

 fig. 15 (not 16)== Chione simiUima, Sby., no. 39 ; a good Lower Californian 

 species. It seems that the error was not in numbering of the figures, as 

 Mr. Nuttall supposed, but in Conrad's identification of Broderip's species]. 



'iO.Chio7ie excarata [is closely related to Ch. mcdncta ; the unique type, however, 

 in Brit. Mus. displays characteristic differences of sculpture. It is singu- 

 larly like the W. Indian Ch. amceUata, and may prove exotic]. 



Al.Cypricardia (Jallfornica [=C Guiniaca, Lam.,^C. Dnperryi, Desh. Almost 

 certainly from the Sandwich Is. J. 



45, 456. Cardium Califormanum \_=C. NnttaUii, var. The species is named " C, 



corbis, Mart.," by Desh. MS. in Mus. Brit, and Cuming]. 



46. Cardium qitadragenaiium [= C luteolabrum, Gld.]. 

 51. 0. a.'deo, no. 32. 



50. 3Iodi<ila recta. [Described from very young specimens. The broad form u 

 M.fahiUata, Gld.] 



IjQ. Myfdils hifurcatus. [The type is lost ; the figure and description wou^d suit 

 many species. It is allocated, in Mus. Cum., to the Californian Septifer] 

 but by Pease to a Sandwich Island 3Ii/tihis.l 



CO. [None of Conrad's species of Isor/n moti have been confirmed as from Califor- 

 nia. They ai*e known to inhabit the Pacific Islands.] 



626. [Mr. Nuttall also brought an oyster, which he named in MS. O. latecaudata, 

 = 0. lurida, var.; and Hinnitcs giffanteiis, Gray, = /r. Poidsoni, Conr.] 



64. [Dr. Gould states that //. Nicldunana, Lea, = ^. Californiensis, Pfr., Chemn., 

 Rve. ; but that II. Californieiisi:,, Lea, is distinct.] 



69. Helix Toirnsotdiana [ = 7/. ceruginosa, Gld. MS.]. 



74. Chiton Nidtallii [is an Iscluiochitoii]. 



75. Chiton acutus [is an abei-rant form of Mopalia. " Cliiton consimilis,'''' Nutt. MS. 



in Brit. Mus., appears to be 3Iopnlia Ilindm, var. '* Chiton Califtrnicus " 

 Nutt. MS.,=" Aratdhopleirra " scabra, Rve.]. 

 77. Patella inamiUata, Nutt. [(non Esch.) is now assigned in Mus. Cuming to 

 Acmtpa scabra, Nutt., var. limafula\ 



83. Fissttrella ornata, Nutt. [ = -?' volcano, Rve.l. 



84. Gli/phis den-iclathrafa, Rve. \_V. atdea, p. 522. The shell has been lost.] 



86. H. Call orniensis, Swains, [(not Californiana, Yai\., = rafescens), is an extreme 

 var. of //. Cracherodii. The series in the Smithsonian Mus. have 5, 6, 7, 

 8, and 9 holes; as soon as it has 10 and 11, it passes into Califomiensis, 

 ■which was figured in 1821 with 9 holes. AVhen these are numerous, they 

 are generally small in proportion]. 



91. Calliostoma doliarium [=C. canaHctdatwn, Mart. This and C. anmtlcdinn, 



Mart., are quite distinct from C.Jilosmn, which= C. cnstatum, Mart.]. 



92. Omiihalius cder [is the S. American species. The common Californian shell is] 

 94. O. marginatus, Nutt. MS. [^=funebralis, A. Ad.]. 



976. The collection contains one specimen of Crepidula dorsata. 

 103. [Is a Serpulorbis, without operc, teste Cooper.] 



106. Litorina tenebrata [should be patula, Gld. (non Jeffr.). Nuttall's MS. name 



was published by Phil, in 1845]. 



107. Natica ? marocccma. var. Califurnica. [The varietal name must be dropped. 



The shell certainly came from the Sandwich Islands.] 



108. [The shell is Vitularia salehrosn, jun., and not] Panella triqnetra. 



109. Mitra maiira [Swain ., teste Rve. (?ubi) = i^f. orietdalis, Gray, =M. ^' Chi- 



le nsis" Kien.J. 



110. Olivella fflandinaria, Nutt. [=0. hiplicata, Sby.]. 



112, 113. Purpura aperta and P. harpa [are certainly from the Sandwich Mand^j, 

 114. Purpura emarginata [was described by Desh. from an immature specimen iu 



which a half-formed knob caused an " emargination." The adult is one 



very extreme form; P. ostrina, Gld., is another ; P. fuscata, Fbs., is a tliird. 



The normal condition is P. lapillus, Cooper (non Linn.),=AYmco/a, Val, 



Mr. Nuttall's collection also contains] P. crispata, var. 

 116. 3Ionoceros brevidcns [is an accidentally short-toothed form of 31. lapilloidei], 

 lis. Cerostomn Nuttallii [with C.foliutum and C.monoceros, Sby., belongs to 7\ir- 



puridce]. 



