The Relation of Mollusks to Fish in Oneida Lake 131 
in which the following genera dominate by the larger number 
of individuals present. 
Lymnea stagnalis. Lampsilis, Elliptio. 
Galba, Goniobasis. Acella, Pseudosuccinea. 
Amnicola, Bythinia. Bythinia, Physa. 
Spherium, Gillia. 
Fig. 35. Diagram illustrating quantity of mollusks in one square foot 
at station XIX, sandy bottom, water 18 inches deep, 162 
Specimens present. 
b. Spherium vermontanum (1). 
Amnicola lustrica (23K 
X. Amnicola limosa (16). 
t+ Bythinia tentaculata, mostly young (63). 
* Goniobasis livescens, mostly young (5). 
0. Valvata tricarinata, ad. & Juv. (9). 
ce. Planorbis campanulatus (1). 
Y. Planorbis hirsutus, ad. & juv. (5). 
© Planorbis antrosus, ad. & juv. (11). 
v. Galba catascopium, mostly juv. (26). 
{| Physa ancillaria warreniana, ad. & juv. ( 3). 
