282 College of Forestry 
The discovery of this race of Lymnewa in Oneida Lake 
Was a surprise as was also the presence of Planorbis binneyi 
and Physa ancillaria warreniana. This Lymnea lives under 
similar conditions in both Oneida Lake and Tomahawk Lake. 
It has not before been reported from New York State 
(though probably included by Beauchamp under the name 
stagnalis) and was previously known only from Minnesota, 
Wisconsin, and Michigan (F. C. Baker, 1911, p. 155). At 
Isle Royale a Lymnewa occurs which seems referable to this 
‘race, though not exactly typical. It is found in protected 
harbors where the water is quiet (p. 289). 
The increase in the size of the aperature and the decrease 
in the height of the spire is due to a rough water habitat, 
which makes it necessary to have a larger foot surface to 
enable the mollusk to retain its hold on the rocks. This 
feature is carried to the extreme in the race sanctemarie of 
Walker (Walker, 1908, p. 289, fig. 2-3; F. C. Baker, 1911, 
p- 156), in which the spire is still farther reduced and the 
aperture enlarged. This race lives on shores where the 
waves are violent. Kge capsules were noted in nearly all 
habitats attached to lily leaves, Typha leaves (dead), 
Potamogeton natans leaf, and on bottom debris. Lillian 
has been observed on the following plants: 
Pickerel-weed (Pontederia cordata). On stems. 
Water Willow (Dianthera americana). On stems. 
American Bulrush (Scirpus americanus). 
White Water Lily (Castalia odorata). On leaves and stems. 
Yellow Water Lily (Nymphaa advena). On leaves and stems. 
Observed feeding on filamentous green alge and dead 
leaves of Cat-tail (Typha angustifolia). A study of the 
stomach contents showed it to feed on bryozoan statoblasts 
(Plumatella), Planorbis campanulatus, and alge and plant 
fragments. Under the generie name of Lymnaea, three 
species of fish are listed as using this group of mollusks as 
food; Dog-fish, Common Whitefish, and  Steel-colored 
Minnow. 
