1899. — Dredged on the east coast of Hudson Bay, in Richmond Gulf, in 15 

 to 25 fathoms, soft mud. 



Wakeham, Commander W. 

 1897. — During the Hudson Bay Exploring Expedition of this year, in the 

 SS. Diana, Dr. Wakeham, the officer in charge, dredged on the west side 

 of Hudson Bay, twenty miles off Churchill (Keewatin) in 20 fathoms. 



It has long been known that there ate areas of shallow and comparatively 

 warm water, tenanted by a northern extension of the "Acadian fauna," in 

 the southern portion of the region under consideration. According to 

 Verrill, the Acadian fauna was " named by Lutken, but first distinguished as 

 the !Nov-a Scotian by Dana. "It extends from the Syrtensian southwardly 

 to Cape Cod, close to the shore, but pushes furtlier southward in deeper 

 water, and at a distance from the shore."^ In the ^Maritime Provinces this 

 northern extension of the Acadian fauna seems to occupy the shallower and 

 more sheltered portions of the Bay of Fundy, such as Passamaquoddy Bay 

 and the Minas Basin ; and of the Atlantic coast of Nova Scotia, as in 

 Halifax Harbour and the shores of Sable Island. In the Gulf of St. Law- 

 rence it probably embraces or surrounds the Magdalen Islandn, and is 

 definitely known to occupy the whole of the sea bottom betweeen Cape 

 Breton and Prince Edward islands, and of Northumberland Strait; also the 

 shallow water on the north east coast of New Brunswick, to Carraquette 

 Bay, on the southern side of the Baie des Chaleurs. Among the more char- 

 acteristic moUusca of the Acadian fauna in Canada are both varieties of the 

 American oyster (Ostrea Virginica) and the Qualiog or hard shelled clam 

 ( Venus merceniria). Besides these, the following species may be noted as 

 also very characteristic of this fauna, though some of them are rare and 

 local in Canadian waters. An asterisk is prefixed to those of which the 

 writer has seen no authentic Canadian specimens. 



Pecten gibVms, var. borealis. 

 *Niicula pruxinia. 

 *Cardiura (LiBvicardium) Mortoni. 



Astarte castanea. 

 II imdata. 



Callista convexa. 



Petricola pboladiforniis. 



Muliiiia laterali-'. 



Cumingia tellinoides. 

 *Solenomya velum. 

 * M borealis. 



Clidiophora Gouidiana. 

 *Lyonsia hyalina. 



Dentaliuiu entails. 



Turlxmilla intenupta, var. fulvocincta. 



Odostomia trifida. 



Crepidula fornicata. 



II plana. 



Crucibuluin striatum. 

 Bittium nigrum. 

 Cerithiopsis Greenii. 

 Urosalpinx oinerea. 

 Astyris lunata. 

 Nassa (Ilj\anassa) obsoleta. 

 Xoptunea decemcostata. 

 Tornatina canaliculata. 



It will be noticed that, with the exception of the Dentalium and possibly 

 of the TurhoniUa and the two Crepiduhe, all of these are purely American 



* U. S. Fish Commission, Report for 1871-72, published in 1873, p. 782. 



