MARSHALL : ADDITIONS TO 'BRITISH CONCHOLOGY.' 243 



I say nothing against the compilers of this official list, who 

 obviously have taken great pains and given much time to it. If 

 published in their own names, and as their own list, there would 

 be little to object to; but it is no light matter for the Society, as 

 such, to impose these wholesale alterations on those who have 

 formed their collections, and who do not care to go to school 

 again. Such fundamental changes are the despair of naturalists, 

 and if followed would necessitate every collection in the king- 

 dom being periodically pulled to pieces and reorganised. 



The following are the proposed additions : — 

 Crania anomala var. alba Jeff. Shell white. This was 

 published in the ' Appendix to British Conchology,' but 

 omitted by error from Mr. Somerville's List. 

 Anomia ephippium var. squamula L. Indicated by 



Jeffreys in ' B. C.,' but not described. 

 A. ephippium var. aculeata Miill. Indicated by Jeffreys 



in ' B. C.,' but not described. 

 A. ephippium var. cylindrica Gmel. Indicated by Jeffreys 



in ' B. C.,' but not described. 

 Pecten aratus Gmel. Living specimens were procured in 

 the 'Triton' cruise(i882)between the Hebrides and Faroes, 

 in 530 fathoms. Also, 'North of Hebrides, 530 fathoms 

 (Carpenter and Thomson); the 'Lightning' cruise, 1868; 

 East Shetland, an imperfect valve (Barlee) ; Runnelstone 

 Lighthouse, off Land's End, another valve (Hanley) ; west 

 coast of Ireland, 340 fathoms, another valve, semi-fossil 

 (Hoskyns).' — ' British Conchology,' vol. ii., pp. 64 — 5 ; 

 vol. v., p. 167. 



Although the latter instances afford very slender evidence 

 of this species living in our seas, the former would indicate that 

 it only wants searching for to establish its position even to those 

 who consider the ' cold area ' between the Hebrides and Faroes 

 forbidden ground to English collectors. And this opens up the 

 moot point— what is the British zone? For the purposes of 

 this paper, at any rate, I consider that the British area extends 



