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Family Aporrhaidce. 

 Aporrhais occidentalis, Beck. 



Rostellaria (Aporrhais) occidentalis, Beck (1836). 

 Hostcllaria occidentalis, Gould (1841). 

 Aporrhais occidentalis, Sovverby (1847) ; et auct. 

 Arrhoges occidentalis, Gabb (1868). 



Bay of Fundy, Atlantic coast of Nova Scotia, Gulf and mouth of the 

 River St. Lawrence, at many localities, northward to Hopedale, on the 

 Atlantic coast of Labrador, abundant, living, in from 10 to 60 fathoms. In 

 1871 a living and adult example of a thin, inflated variety of this shell was 

 dredged by the writer, N.E. of the Island of Anticosti, in 120 fathoms, 

 mud. 



On sandy or muddy bottoms the shells of this species are beautifully perfect 

 and their sculpture is well preserved. But, upon rocky bottoms, or bottoms 

 of loose stones, the shells, even of living specimens, are much broken, and 

 their surface markings almost or quite obliterated. 



Packard has found A. occidentalis fossil at Tertiary Bay, Labrador. 



Rhachiglossa. 



Family Muricidre. 



Urosalpinx cinerea (Say). 



Fusus einereus, Say (1822 and 1831). 

 Urosalpinx cinerea, Stimpson (1865). 



Prince Edward Island (Sir J. W. Dawson, 1871); Charlottetown Har- 

 bour, P.E.I, (F. Bain, 1875). 



Trophon truncatus (Strom). 



Tritonium clathratum, O. Fabricius (1780) ; but non L., teste G. 0. Sars, 



Buccinum truncatum, Strom ; fide Jeffreys and G. O. Sara. 



Fusus Bamffiiis (Donovan) Gould (1841). 



Tritonium clathratum, Stimpson (1853). 



Trophon clathratus, Stimpson (1860) ; and Gould (1870). 



Trophon truncatus (Strom) G. O. Sars (1878). 



Grand Manan, " on a patch of shelly bottom, about two miles north of 

 Duck Island " (Stimpson) ; Annapolis Basin (Verkruzen). Fishing banks 

 off Halifax (Willis) ; Halifax Harbour (J. M. Jones). Gulf of St. Lawrence, 

 Gaspe Bay, in about 30 fathoms (Whiteaves) ; Ruisseau de la Grand Vallt^e, 

 (Bell). Probably a small and finely ribbed form of the next species. 

 12 



