126 



off Halifax (Willis) ; Halifax Harbour (J. M. Jones). Occasionally met 

 with in Northumberland Strait, by the writer in 1873, associated with T. 

 limat'ida, of which it may be a small " abbreviated " variety ; Little Metis 

 (Sir J. W. Dawson) ; off Caribou Island, at a depth of 10 to 15 fathoms 

 (Packard). 



Fossil at Black Point, N.B. (G. F. Matthew). 



YOLDIA MYALIS (Couthouy). 



Nucula myall's, Couthouy (18.38). 

 Lcda mijalis, Stimpson (1851). 

 Yoldia myalis, Gould (1870). 



Grand Manan, 20 fathoms, mud (Stimpson) ; Bay of Fundy and Annapolis 

 Basin (Verkruzen) ; fishing banks off Halifax, rare (Willis) ; Gulf of St. 

 Lawrence (Mighels). Gulf and mouth of the River St. Lawrence, at Gaspe 

 Bay and the coast of the Gaspe peninsula. Sir J. W. Dawson (as Leda 

 Umatilla), Bell, and the writer ; Little Metis, Kamouraska, and Murray 

 Bay (Sir J. W. Dawson). North shore of the Strait of Belle Isle, at L'Anse 

 au Loup, in 15 fathoms, sand, a very badly worn valve, Stearns expedition 

 (Miss Bush). Port Burwell and Ashe Inlet, Hudson Strait (Bell). A more 

 northerly species than Y. limatula, as pointed out by Professor Verrill. 



A single valve of Y. myalis was found in the Leda clay at Hopedale, 

 Labrador, by Dr. Packard in 1864. 



YOLDIELLA LUCIDA (Lovcn). 



Yoldia lueida, Loven (1846) ; et auct. 

 ? Leda obcsa, Stimpson (1851). 

 Yoldia obcsa, Gould (1870) ; et auct. 

 Yoldiella lueida, Verrill and Bush (1897). 

 Yoldia (Yoldiella) lueida, Dall (1898). 



A few living specimens of this species were dredged by the writer in 1871, 

 1872 and 1873, in the deepest parts of the Gulf of St. Lawrence to the north, 

 south and south-east of the Island of Anticosti, in 100 to 313 fattioms, mud, 

 associated with Pecten Groitilandicus, Dacrydium vitreum, Area pectu7ieu- 

 loides, a dwarf form of Astarte crebricostata, &c. Verrill says that it is 

 "rare in the Bay of Fundy, in 40 to 100 fathoms." 



Yoldiella prigida (Torell), 



Yoldia frigida, Torell (1859) ; G. O. Sars (1878) ; et auct. 

 Yoldiella frigida, Verrill and Bush (1898). 



Living specimens of this shell were dredged sparingly by the writer, in 

 1871, 1872 and 1873, with the preceding species, in the deepest parts of the 

 Gulf of St. Lawrence. 



