332 Mr. A. Hancock on Shells dredged on 



much larger, and has the outer lip not so broadly reflected on 

 the columella; the groove also on the pillar-lip is not by any 

 means so broad, and it is gradually lost, revolving into the shell ; 

 whilst in the V. undata it commences behind with comparative 

 abruptness ; the inner edge of the columella of the former is 

 therefore twisted as it runs up the pillar, but is nearly straight 

 in the latter. 



It is right, however, to observe that the surface of the two 

 species is much more alike than would appear from the descrip- 

 tion in the ' Wernerian Transactions/ which is undoubtedly from 

 worn specimens. In the Newcastle museum there are three or 

 four shells from the Clyde district, which, I believe, were received 

 from Mr. Smith. These specimens agree pretty accurately with 

 the description given by that gentleman, but when closely ex- 

 amined with a glass small portions of the true surface are found 

 adhering, and they are minutely spirally striated in the same 

 manner as in V. zonata. 



J Natica Grcenlandica, Beck. 



Natica Grcenlandica, Beck, in Moller's Index Mollus. Groenl. p. 7. 

 Only one specimen occurred : it is small, measuring no more 

 than seven-sixteenths of an inch in length; and it is rather 

 doubtful whether it belongs to this species or not ; from which it 

 differs likewise in being thinner, and in having the sutures of 

 the whorls more deeply impressed. In this respect it agrees 

 better with the N. borealis of Gray, to which, indeed, it seems 

 closely related. 



Patella rubella, Fabr. 

 Patella rubella, O. Fabr. p. 386. 



A single specimen was taken adhering to a large Psolus, re- 

 sembling the Holothuria squamata of Miiller : the Patella agrees 

 very accurately with the description given by Fabricius, though 

 instead of being entirely red it has only the apex of that colour ; 

 the rest is of a tawny horn-colour. 



Pecten Islandicus, Miiller sp. 



Ostrea Islandica, Miiller, Zool. Dan. Prod. no. 2990. 



Three or four specimens occurred : they have the valves more 

 distinctly ribbed than in those brought from the coast of New- 

 foundland. 



Pecten Grmnlandicus, Sowerby. 



Pecten Grcenlandicus, Sow. Thesaur. Conchyl. vol.i. p. 56. pi. 13. 



f.40. 

 Pecten vitreus, Gray, App. Parry's 1st Voy. p. 214. 



There are three specimens of this delicate, diaphanous species 

 in the collection : they agree pretty accurately with Mr. Gray's 



