372 THE CANADIAN NATURALIST. [Oct, 



shells were correctly identified with the Behring's Straits species. 

 His description of the grooving does not exactly tally with that 

 seen in my specimens, and I have met with no forms agreeing well 

 with his figures. The question must be decided by direct com- 

 parison at some future opportunity. 



The Buccinum angulosum may, at any rate, be considered as a 

 truly arctic species, found as yet only in the vicinity of the north- 

 ern coasts of Asia. It has not occurred as a fossil. 



Buccinum striatum Sow. 



Buccinum striatum Sow., ' Records of General Science, i, 134 ;' Smith. 

 Wern. Mem., viii (1839), 100 ; i, 9. (Not B. striatum of Pennant.) 



Tiitonium (Buccinum) ochotense Middendorff, Sibirische Reise, Zool. 

 (1851), 235; x, 12; ix, 5. 



Shell of moderate size, thick, rather elongated and appressed ; 

 whorls seven, not convex, not angulated, but in some (of the 

 same species ?) carinated by five or six of the revolving ridges which 

 are more prominent than the others. Longitudinal folds eleven in 

 number, not at all oblique, rather distant, and prominent, especi- 

 ally at^the suture. Spiral ridges and grooves as in B. glaciate, 

 except that the primaries are more numerous. Aperture a little 

 less than one-half the length of the shell, rather narrow ; outer lip- 

 scarcely sinuated; columella projecting beyond the anterior 

 extremity of the outer lip. 



Length 2 ; breadth 1 inch. 



This species I have never seen. The description is founded 

 upon the accounts given by Smith of B. striatum Sow., and by 

 Middendorff of his B. ochotense. I have never seen the original 

 description of Sowerby, but can find no essential difference between 

 the form as described and figured by Smith and the B. ochotense. 



B. striatum has the elongated, appressed form of B. ciliatum, 

 with the sculpture of B. glaciale. Its longitudinal plications are 

 few, straight, and strong. It differs from B. angulosum in its 

 narrow aperture and flat spiral ridges, but the form which we have 

 regarded as a carinated variety may prove to be identical with 

 angulosum and not with striatum, when the sculpture is more care- 

 fully examined. 



The shell first occurred as a fossil in pleistocene beds of the 

 Clyde, where it was found by Mr. Smith of Jordan Hill. It has 

 as yet been found living only in the Sea of Ochotsk, by Dr. Mid- 

 dendorff. 



