104 THE NAUTILUS. 



* Anodonta marginata Say. With preceding and at Barlows, 

 common. 



* Mytilus edulis Linn., var. Bedeque and Richmond Bays, on 

 oyster beds. 



Modlolus modlolus Linn. Northumberland Strait, rare and in 

 deep water. 



* Modlolus demissus Dillw., var. plicatii/usl^am. Abundant in all 

 salt-marshes. 



Ostrea virginica Gmel. Bedeque and Richmond Bays, very 

 abundant. 



Pecten gibbus L., var. boreal is Say. Richmond Bay and North- 

 umberland Strait, not very abundant. 



NOTE ON SOME FORGOTTEN MOLLTJSK-NAMES. 



BY WILLIAM H. DALL. 



In preparing my report on the land and fresh-water mollusks of 

 Alaska and adjoining regions for the Harriman Expedition series 

 (now published), I searched the available literature for data on the 

 nomenclature of Planorbis, and supposed I had gathered references 

 to all names which had been applied to members of that group above 

 the rank of species. A chance remark by von Martens caught my 

 eye while searching the Malakozoblogische Blatter a few days ago 

 for something else, and following up the clue, I came upon a group 

 of names given by Benson in 1841, but not published until 1855, 

 which do not occur in any nomenclator I have been able to examine. 

 As it seems eminently desirable that such mavericks should be duly 

 recorded, even when they do not supersede others more familiar, I 

 take that duty upon myself. 



In the Journal of the Asiatic Society of Bengal, volume xxiv, 

 part 2, 1855, is published a report on the shells of Chusan which had 

 been prepared in 1841, but never before put in type. It contains 

 certain new generic names which have found their way into the 

 nomenclators, viz., Indiana, Balillaria and Laguncula. In addi- 

 tion to these there is a revision of the subdivisions of the genus 

 Planorbis, to which I have never seen any reference, and von Mar- 

 tens seems to have been the only person who has ever cited any of 

 the names there given, and he mentions only Helicorbis. 



