The Relation of Mollusks to Fish in Oneida Lake 289 
Needham (1901, p. 402) lists three species of snails from 
Clear Creek, situated at the fish hatchery, Saranac Inn, in 
the Adirondack mountains. 
Physa heterostropha Say. Spher.um simile Say (=sulcatum 
Galba desidiosa Say. Lamarck). 
Embody, in his interesting paper on “The Farm Fish 
Pond” (1915, p. 238) recommends the introduction of 
mollusks into bodies of water used for the culture of fishes. 
These mollusks appear, from the illustrations, to represent 
the American species noted below, reading from upper to 
lower figure. ‘They are all valuable as fish food: 
1. Lymnea (Galba) palustris Miiller, upper two figures. 
Lymnea (Galba) humilis modicella Say, lower figure. 
2. Physa gyrina Say, upper figure. 
Physa integra Hald., middle figure. 
Physa gyrina Say, lower figure. 
3. Campeloma decisum Say, three figures. 
4. Planorbis trivolv.s Say, upper two figures. 
Planorbis antrosus Conrad, lower two figures. 
5. Spherium sulcatum Lam., upper figure. 
Spherium sp., second figure. 
Spherium occidentale Prime, fourth figure. 
Museculium securis Prime, third figure. 
5. SUMMARY. 
The western end of Oneida Lake supports a molluscan 
fauna embracing 62 species and varieties, very evenly dis- 
tributed on all shores of the lake and its islands. The studies 
of the 1915 season cover about one-third of the shore line of 
the lake. The bouldery points and sandy bays, usually 
unprotected, are usually the best habitats, although one pro- 
tected, sandy shore, protected by aerial vegetation, produced 
the largest number of species, 27. Four types of shells may 
be noted: The naiades or clams, with 15 species; the small 
bivalves, Spheriidee, with 14 species; the Prosobranchiates, 
or gill-breathers, with 12 species; and the Pulmonates, or air- 
breathers, with 21 species. The number of species will prob- 
ably be largely increased with additional collecting. 
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