. 
| 
ay 
- 
5. 
TABLE NO. 8, 
The Relation of Mollusks to Fish in Oneida Lake 
143 
EATERS OF MICROSCOPIC FOOD. 
SprEcIEs. 
Hasirat or Mouuusss. 
Vivipara contectoides.... 
Campeloma decisum..... 
Campeloma integrum.... 
Goniobasis livescens..... 
Amnicola limosa........ 
Giriltay litlt8, sie sci 
Bythinia tentaculata..... 
Somatogyrus subglobosus . 
Galba catascopium....... 
Planorbis antrosus...... 
Planorbis campanulatus. . 
Planorbis binneyi....... 
Physa integra........... 
Lymnea stagnalis lilliane 
Ancylus tardus......... 
Spherium vermontanum.. 
Spherium stratinum..... 
Musculium securis 
Pisidium ferrugineum 
Pisidium compressum 
Pisidium variabile...... 
Pisidium equilaterale 
Pisidium henslowanum. . . 
Elliptio complanatus..... 
Strophitus undulatus..... 
Lampsilis rudiata....... 
Lampsilis borealis....... 
Lampsilis luteola........ 
Lampsdts tris.......... 
Anodonta cataracta...... 
Anodonta implicata...... 
Anodonta marginata..... 
Anodonta grandis footiana 
Physa ancillaria warreniana 
Pisidium compressum levigatum 
Magraritana margaritifera 
Alge. 
On Stones 
or Shells. 
| 
| 
| 
On Sand. 
Plankton. 
Burrowing 
in Sand. 
| Detritus & | 
Detritus & 
| Plankton. 
HAKHK KKK KKH 
12 
In the table it may be noted that the boulder-inhabiting 
gastropods are algv eaters. 
over the slime on the stones. 
They have been seen browsing 
Those species living on the 
sandy bottom probably eat slime, alge and the dust-fine 
detritus of the top layer. Those species that normally burrow 
in the bottom are doubtless divided in their source of material. 
The snails and small bivalves must necessarily eat the 
