384 MARSHALL : ADDITIONS TO ' BRITISH CONCHOLOGY.' 



more gracefully proportioned, and the spire never terminates 

 abruptly as in that species, and is probably widely diffused on 

 our coasts, and not uncommon in Jersey and Torbay. At 

 present I am sure only of the following localities for it : — 

 St. Aubin's Bay, Jersey ; Guernsey ; Borough Island, Tor- 

 bay, and Exmouth, South Devon ; Portmarnock. L. o"35. 

 B. o"o6. Most of the shells under this name in British 

 collections will be found to belong to this form. 



Var. grossa Monts. MS. This is less cylindrical than the type, 

 and broader throughout, with coarser sculpture. It has 

 somewhat the proportions of O. ladea, for which it may 

 easily be taken, but it is never conical like that shell, the 

 lower whorls being of the same width, and rounder at the 

 base. I know of only three localities for this variety, all 

 northern — Stornoway, 10 fathoms; Loch Inver, 25 fathoms; 

 and Gairloch, 12 — 30 fathoms. In the latter district it is 

 fairly plentiful. L. o"35. B. o'oS. 



Var. cylindrata Marshall. Already described by me (^) and 

 recorded from various localities. This is very slender and 

 cylindrical, the base somewhat contracting, and it resembles 

 a large and coarse O. delicata. L. o"3o. B. o'04. Not 

 ' Eitliinella cylindrata Dunker. 



Var. minuscula Marshall. Also previously described (-) and 

 recorded from Jersey, North Wales, &c. 



O. innovata Monts. (emend.). This is the form described by 

 Jeffreys as O. piisilla in ' British Conchology.' It is a 

 scarce shell, and I have not found it in any number except 

 at Guernsey. The following localities may be relied 

 upon: — Jersey, Guernsey, and Herm ; Scilly, 40 fathoms; 

 Borough Island and Torbay, South Devon. The ribs on 

 the last whorl are not continued so far down as in O. 

 fusilla and O. ladea, nor do they end so abruptly. The 

 sculpture is exactly that of O. signioidea Monts., oblique on 



(i) 'Journal of Conchology,' October, 1S93. 

 (2) 'Journal of Conchology,' April, iSgi. 



J.C, vii., Apr. 1S94. 



