The Relation of Mollusks to Fish in Oneida Lake 263 
26. Pisidium species (field No. 252). Not figured. 
Station III, habitat 2, uncommon. 
27. Pisidium species (field No. 238). Not figured. 
This undescribed species aaa! at s‘ation XIX un- 
commonly, 
28. Pisidium species (field No. 234). Not figured. 
Station IX, rare. 
29. Pisidium species (field No. 217). Not figured. 
Station XX XI, habitat 1c, rare. 
The last four species are in the hands of Dr. V. Sterki 
awaiting the acquisition of additional material before they 
can be satisfactorily determined. 
Fourteen species and races of Sphzriide are recorded from 
Oneida Lake in the preceding pages. Of the material sent 
for examination Dr. Sterki says: ‘‘ As you see from the 
Jist, the material is interesting, but somehow insutticient for 
satisfactory study and determination, considering the great 
variation of most of the species. For many years it has 
been my desire to get good and ample material from that 
region, which must be \ very rich in Spheeriidee — and other 
Eresh- water mollusks. From the whole great State of New 
York, we know very little outside of what Dr. Jas. Lewis 
collected in the Mohawk. You should have 30 species or 
more of Spheriidee in your vicinity; eastern and more 
western species appear to meet there; and there ought to be 
more than 20 species (plus varieties) of Pisidium.” It is 
quite probable that, as Dr. Sterki predicts, a much larger 
Spherid fauna will be discovered after further examinations 
of the Jake and surrounding country have been made. 
Undetermined Pisidia are eaten by the following fishes: 
Common Whi'efish, Common Bullhead, Fresh-water Kully, 
Pumpkinseed. 
Fig. 43. 1, Lampsilis luteola, male; 2, Lampsilis luteola, female; 3, 
Lampsilis radiata, male; 4, Lampsilis rad.ata, female. 
