PLEISTOCENE FOSSILS. 255 



A single mutilated specimen alone, as yet, represents this species in 

 my Pleistocene collections. 



Astyris Holbollu. Holler. 



Fossil Riviere-du-Loup ; also glacial beds Britain (Jeffreys). 



Recent Little Metis ; Kamouraska ; Gaspe; Murray Bay ; Labra- 

 dor (Whiteaves). If identical, as I suppose, with Columbella rosacea 

 (Gould), it extends south to New England, and Gould's name has 

 priority. 



Buccinum undatum. Linn. 



var. undulatum. Moller. 

 var. Labradoricum. Reeve. 



Fossil Saxicava sand and Leda clay, Riviere-du-Loup ; Anticosti ; 

 Labrador ; Duck Cove, St. John, N.B., (Matthew) ; Maine (Packard). 



Recent Little Metis ; Gaspe ; Kamouraska, &c. ; Gulf St. Law- 

 rence ; south Greenland to Nan tucket. (See figure, Plate I. ) 



I cannot satisfy myself that there is any good specific distinction 

 between this shell and B. undatum of the European seas and glacial 

 beds. It varies very much in size, in slenderness, in the fineness of the 

 spiral striation, in the development of the ribs, in the extension of the 

 mouth, and in the thickness of the shell. The coarser forms are 

 B. Labradoriciim, which passes into the ordinary undatum. Medium 

 varieties are B. undulatum and smooth varieties pass into B. cyaneum 

 and B. Tottenii, which last is the ciliatum of Gould. 



Buccinum Tottenii. Stimpson. 



Fossil Riviere-du-Loup, Saxicava sand and Leda clay. 



Recent Little Metis ; Murray Bay and Tadoussac ; also Newfound- 

 land Banks. It has some resemblance to B. Humphrey 'sianum, Bennet, 

 but is specifically distinct. It is the B. ciliatum of Gould, but has no 

 connection with the ciliatum of Fabricius, except a slight resemblance 

 to the smoother forms of the latter. It is remarkable for its very 

 regular spiral lines, absence of folds and convex whorls. 



Buccinum cyaneum. Bruguiere. 



Fossil Riviere-du-Loup, abundant. 



Recent Murray Bay and Tadoussac ; Little Metis ; deeper parts of 

 Gulf St. Lawrence (Whiteaves) ; Arctic seas. 



This species or varietal form is well represented in the figure, which 

 is taken from a large Riviere-du-Loup specimen. Being on the one 

 hand very near to if not identical with the smooth varieties of B. 



