Oregon , The failure of Urosalpinx to establish itself is strikingly 

 illustrated in this state. Marriage (pers. com) writes that Oregon's coastal 

 waters are free of the eastern drill in spite of shipments of eastern oysters to 

 this state in the middle and late 1800's, No recent shipmentsjaf oysters are re- 

 ported. No reason for the absence of Urosalpinx h ere is available, except perhaps 

 that insufficient drills were imported, or that ecological barriers prevented repro- 

 duction . 



Washington . In 1906, 95 carloads of eastern oysters were introduced to 

 Willapa Harbor (Elsey, 1933), and in 1907 Smith reported that the Bureau of 

 Fisheries also planted 80 barrels there. Lindsay (pers. com.) writes that at 

 the present time this snail occurs sparsely in Samish Bay, Padilla Bay, Rocky 

 Bay-Case Inlet, Oakland Bay, Oyster Bay-Totten Met, Mud Bay-Eld Inlet, 

 Ni squally Flats, Frinnon Flats, and Willapa Harbor . It is likely that the drill 

 entered Samish Bay, Padilla Bay, Oyster Bay, and Willapa Harbor on direct trans- 

 plantation of year -old oyster seed from the Atlantic coast, and on transplantations 

 from San Francisco Bay to all of these bays except Padilla Bay. Infestations present 

 in Rocky Bay, Oakland Bay, and the Nisqually Flats are definitely traceable to 

 transplantations from other bays He states that evidence of serious damage to 

 oysters by this drill in Washington is not indicated to date . Chapman and Banner 

 (1949), for example, reported that in Mud Bay where U. cinerea is present and 

 the Japanese drill is absent, the total number of oysters drilled on all beds was 

 less than 1%, Lindsay suggests that generally the habitats found in Puget Sound 

 are not particularly favorable to the survival of U cinerea and it does not occur 

 there m large concentrations . 



Western Canada . In 1906, three or four carloads of eastern oysters were 

 planted in Boundary Bay and Esquimalt Harbour, British Columbia Importations 

 into this region at first consisted of seed oysters, but because of high mortalities, 

 three to four year old oysters were transplanted. Considerable mortabty occurred 

 among these also, so by 1912 importations diminished considerably, and by 1933 

 only two to three carloads were imported annually to British Columbia . As a result 

 of these importations U . cinerea occurred plentifully in Boundary Bay and at 

 Crescent, and less abundantly in Ladysmith Harbour by the early 1930 's (Sherwood, 

 1931; Elsey, 1933). 



Great Britain 

 The establishment of U. cinerea in English waters represents another 

 remarkable extension of the range of this hardy animal by man. A few early 

 records shed some light on the time and means of its introduction. Ingersoll (1881) 

 writes in his highly informative report that about .1871 a New York oyster dealer 

 began the exportation of American oysters into English markets where they sold 



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