The Relation of Mollusks to Fish in Oneida Lake 255 
6. Anodonta grandis Say. Fig. 42, No. 4. 
Found only in the artificial pond above Oneida hatchery 
at Constantia. The specimens were small but typical. 
Found in Saginaw Bay and Georgian Bay, in pond-like 
bodies. Listed by Beauchamp under the names salmonia 
and lewisit. 
7. Anodonta grandis footiana Lea. Fig. 41, No. 3. 
Collected at seven stations, always on an exposed shore, 
living, in company with either or both of the two species 4, 5, 
in sand between boulders. Widely distributed and recorded 
from Lake Michigan, Saginaw Bay, Georgian Bay, Toma- 
hawk Lake and Isle Royale. In the latter region it is said 
to live “ on a sandy or gravelly bottom in smaller coves shel- 
tered from the waves.” It is characteristic of an unprotected 
shore. The difference between typical grandis (Fig. 42, No. 
4) and the variety footiana (Fig. 41, No. 3) is a striking 
example of the effect of a change of environment from a 
still muddy habitat to a rough and sandy habitat. None 
were observed gravid. It is listed as rare by Beauchamp. 
Genus ALasmMIponTa Say. 
8. Alasmidonta undulata (Say). Fig. 40, No. 3. 
But one specimen of this species was obtained, from a 
sandy bay, partly exposed to the waves. The shell was 
badly eroded, possibly by boring alge. This is a species of 
the Lower St. Lawrence drainage. It is listed as rare by 
Beauchamp. 
Genus Srrorpuirus Rafinesque. 
9. Strophitus edentulus (Say). Fig. 42, No. 3. 
But one specimen of this species was collected in Fred- 
erick Creek near the Oneida hatchery at Constantia. This 
Fig. 41. 1, Anodonta cataracta; 2, Anodonta implicata; 3, Anodonta 
grandis footiana; 4, Anodonta marginata. 
