The Relation of Mollusks to Fish in Oneida Lake 15 
ingly. Such a transformation is in progress over the entire 
area between Frenchman and Dunham Islands and will 
‘eventually result in the formation of a pure marsh or swamp 
type, separated from the open lake by beach barriers, which 
will support such vegetation as Buttonbush, Swamp Loose- 
strife and Black Willow. The presence of cat-tails and pond 
lies indicate that this transition is now well under way. 
Habitat 2. (Field Nos. 211, 212). Fig. 23. This habi- 
tat begins near the barrier mentioned in habitat 1, where 
the water is six inches in depth and extends lakeward grad- 
ually deepening for 500 feet until a depth of 5 feet is 
reached, at which point the bottom drops suddenly to 12 and 
then to 20 feet. The shoreward margin is lined with Water 
Willow which extends lakeward, in patches, for a distance of 
several hundred feet. The bottom is very bouldery for over a 
hundred feet from the barrier, where it becomes sandy with 
an occasional boulder. 
ANIMAL LIFE. 
MOLLUSCA. 
Anodonta marginata, between Musculiwm securis, rare, between 
stones, in sand, common. 
Anodonta cataracta, between 
stones, in sand, common. 
Anodonta implicata, between 
stones, in sand, common. 
Lampsilis radiata, between stones, 
in sand, common. 
Lampsilis borealis, between stones, 
in sand, common. 
Lampsilis luteola, between stones, 
in sand, rare. 
stones, near shore. 
Musculium rosaceum, rare, be- 
tween stones, near shore. 
Goniobasis livescens, abundant, on 
stones. 
Galba catascopium, abundant, on 
stones. 
Lymnea stagnalis lilliane, com- 
mon, on stones, near shore. 
Planorbis trivolwis, var., abundant, 
usually on stems of plants, near 
Nephronajas ligamentina, rare, shore. 
but one found. Planorbis binneyi, common on 
Blliptio complanatus, between rocks near shore. 
stones, in sand, abundant. Physa ancillaria warreniana, com- 
mon, on rocks and plants. 
INSECTA. 
Caddis-fly larve (Helicopsyche Water-penny, beetle larve (Pse- 
borealis), on rocks, abundant. 
phenus lecontei), on rocks, abun- 
dant. 
HIRUDINEA. 
Leech (Erpobdella punctata). 
