341 



THE NOMENCLATURE OF BRITISH MARINE MOLLUSCA. 



Bv TOM I RE DALE. 



(Read before the Society, March lolh, 1915). 



" As no list of British Marine MoUusca has been published for 

 fourteen years " begins the List of Marine MoUusca published in 

 this Journal just fourteen years ago. 



I write this note suggesting that it is time that a new list be 

 prepared " incorporating the results of recent researches." 



I have little special knowledge of the species of British Marine 

 MoUusca and would have claimed no more than an academic inter- 

 est in them, but many of the generic names are common to that 

 fauna and the Antipodean fauna with which I am more familiar 

 and which engages my attention. In working at my Antipodean 

 material I have continually to refer to British forms, as they represent 

 generic types which I have to examine. A\'hile thus employed I 

 make note that the British List is now sadly out of date and I 

 propose to indicate herewith a few of the alterations necessary in 

 view of my studies and suggest that these be considered and 

 approved or rejected. 



I further suggest that a list with the original references cited 

 would be most valuable, not only to British workers, but also to 

 extralimital investigators, who are unable to make personal refer- 

 ence to works themselves.^ 



In view of recent monographs a reconsideration of family values 

 is also probably necessary. 



Dall and Bartsch's Monograph of the Pyraiiiidellidce. Dall's 

 monumental effort on the Tertiary MoUusca of Florida, Jukes- 

 Browne's controversial papers on Bivalves, Tln'ele's Revision of the 

 Polyplacophora, the conclusion of Alder and Hancock's Nudi- 

 branchs by Chas. Eliot, Hoyle's Cephalopod Revision have all 

 appeared since 1901. The last two I have not yet been concerned 

 with, so do not know how they affect the list. 



Some of the generic names hereafter mentioned may need dis- 

 cussion, but I simply mention some of those I have noticed as 

 needing emendation or justification. 



Order Polyplacophora. 

 Only one family, Chitonidae, is admitted, but recent studies prove 

 that more should be recognised. 



1 Since this was penned I ha\e compiled such a List with, to me, startling results. 



