DIA.GNOSES 



NEW EOr.MS OP MOLLUSCA 



THE VANCOUVER DISTRICT. 



BY 



PHILIP p. CARPENTER, B.A., Ph.D. 



The shells here described were mostly collected by Indian chil- 

 dren for their excellent teacher Mr.J.G.Swan, in the neighbour- 

 hood of Neeah Bay, W. T. They were presented by him to the 

 Smithsonian Institution, Washington, D.C. ; and, in accordance 

 with their liberal policy, the first available duplicates will be 

 found in the British Museum or in Mr. Cuming's Collection. 

 The species are numbered to correspond with the list in the 

 British Association Report for 1863, pp. 626-628; see also 

 pp. 636-664. 



5. Mcera salmonea. 



M. testa parva, solida, compacta, subquadrata ; Isevi, nitente, epi- 

 dermide tenui cinerea induta ; extus pallide, intus vivide salmoneo 

 tincta; margiuibus dorsalibus rectis, ad angulum 120° separatis, 

 umbouibus haud extantibus ; marginibus antico et ventrali regu- 

 lariter late excurvatis ; parte postica brevissima, hrud angulata : 

 intus, dent. card, utraque valva ii., quorum unus bifidus ; laterali- 

 bus V. dextr. sequidistantibus, ant. extaute, post, parvo ; nymphis 

 rectis, haud conspicuis ; cicatr. add. post, subrotundata, ant. sub- 

 rhomboidea; sinu pallii satis regulariter ovali, per iv. inter v. 

 partes interstitii porrecto. Long. -57, lat. -45, alt. '11 poll. 



Variat testa aurantiaca, rarius albida, rosaceo tincta. 



Hah. San Francisco [Pac. Rail. E. E.) ; Neeah Bay {Swan), 



plentiful; Monterey, 20 fathoms {Cooper). 



In shape almost close to Macoina crasmla, Desh. (Arctic) ; 



but that species is thinner, not glossy or salmon-coloured^ and 



has no lateral teeth. 



6. Angulus variegatus. 



A. testa forma A. ohtvso simili, sed costa interna omnino caren*; '- 

 valde iuEeauiluteiuii, sulidloic, uiteute, rosaceo et flavido subrai^ 



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