THE NAUTILUS. 



81 



Chondrina, it becomes type of that group. No type had been 

 selected previously for Chondrus. Chondrina will therefore re- 

 place Modicella Ads., 1854, as used by Boettger and Westerlund. 

 So far as I know, the other names proposed had all been pro- 

 vided with valid names previously. 



The work covers the invertebrates only. There are some 

 new generic names in other Classes, as well as those in Mollusca 

 noticed above. 



H. A. Pilsbry. 



FURTHER NOTES ON THE MOLLUSCA OF ONEIDA LAKE, NEW YORK ; 

 THE MOLLUSKS OF LOWER SOUTH BAY. 



BY FRANK C. BAKER. 



In a previous paper 1 the writer listed the fresh-water mol- 

 lusks of the west end of Oneida Lake, 62 species and races being 

 represented. In the present paper the fresh-water mollusks of 

 a large bay in Oneida Lake are listed, the additional material 

 bringing the total molluscan fauna of the lake to 91 species and 

 races, of which 5 are new to science. It is highly probable that 

 half the species of fresh-water mollusks inhabiting the State will 

 be found in Oneida Lake when the east end, the deep water, 

 and the small tributary streams are examined. The additional 

 Sphseriidse collected in 1916 is noteworthy, bringing the total 

 number to 32, of which 23 are Pisidia. The deeper water also 

 added several species of note not found in 1915. 



Mollusks were abundant everywhere, being absent from less 

 than one percent of the area examined. Associated with the 

 mollusks were oligochaate worms, planarians, leeches, amphi- 

 pods and other crustaceans, fresh-water insects and insect larvae, 

 and the little water mites, forming together a veritable micro- 

 cosm, in which the majority of fresh-water groups of animals 

 were represented. In point of numbers the mollusks usually 

 predominated. The studies in Lower South Bay were carried 

 on quantitatively for the purpose of ascertaining the available 

 amount of fish food present in this body of water and its im- 



^he Nautilus, xxx, pages 5-9, 191G. 



