i8o 



REPORT OF THE COMMITTEE 



APPOINTED TO DRAW UP A 



REVISED LIST OF BRITISH MARINE MOLLUSCA AND 



BRACHIOPODA. 



The Commitlee, after correspondence with a number of British and Foreign 

 Conchologists, drew up a List, which was ])ublished with an explanatory preface in 

 the Journal for January, 1901. 



Since its appearance, the Secretary has received a number of notes, comments 

 and queries from various quarters, but the Committee are glad to find that the 

 objections to the changes proposed in the list are not nearly so numerous as had 

 been anticipated. 



The Committee have carefully considered the various suggestions received and 

 have modified, or enlarged, the list where this seemed necessary, and they have now 

 the honour to lay before the Council a list as perfect as it is in their power to 

 prepare. 



The British area for the purpose of this list has been taken as thus defined by the 



Rev. Canon Norman {Ann, and Mag. Nal. Hist. (6) vol. 5, p. 345, 454, 1890): — 



South — By latitude 49° 30' N., which parallel passing eastwards terminates at 



longitude 5°o' W., or midway between the Land's End and Brest. Thence 



mid-Channel is followed until latitude 51' 50' N. is reached off the east 



coast. 



East — From latitude Si"" 50' N. , longitude 2" 30' E. is taken as the eastern 



boundary northwards. 

 North — Latitude 60° o' N. , coming from the west as far as longitude 5" o' W., 

 thence due north-east to longitude i" o' W, , thence due east to meet the 

 eastern boundary at 2° 30' E. 

 Wesl-~V)o\^\\ to the base of the continent at 1,500 fathoms. 

 The only alteration made by the Committee has been a detour of tlie southern 

 boundary to include the Channel Islands. 



In the matter of classification the Committee have not followed any individual 

 system, but have endeavoured to adopt the most recent views of specialists in each 

 department. In the vexed question of Nomenclature it has been judged best to 

 follow the rules of the International Zoological Congress. This has involved the 

 adoption of the tenth edition of the "Systema Naturre" of Linne as the starting- 

 point of binomial nomenclature. This last determination has been the cause of the 

 majority of the changes which will be found in the List, Authorities for species 

 which have since their creation been transferred to different genera are given in 

 parentheses. 



Since Jeffreys' " British Conchology " still necessarily forms the text-book of our 

 collectors, it has been thought advisable in those cases where the name adopted in 

 this list differs from that used by Jeffreys to give the latter in square brackets: thus — 

 Pteria Scopoli [-Avicu/n]. 

 A few other synonyms have been similarly inserted. 



When a variety only, and not the typical form of the species, is British, the 

 name of the latter is placed in parentheses : thus — 



(clavatus Poli)). 



V. dumasi Payraudeau 

 The names of a few species whose claims to be regarded as British are very 

 doubtful have been placed in square brackets : thus— 

 [islandicus Mtiilei']. 

 A number of varietal names, apparently based merely on monstrous, stunted, 

 aborted, or young specimens, have been omitted. 



