The Relation of Mollusks to Fish in Oneida Lake = 125 
Quantitative Table No. 5. 
SANDY AND SANDY-ROCKY SHORES, 
This table includes a variety of habitats all agreeing, how- 
ever, in having a large percentage of sand in the bottom com- 
position. Habitat 1 has a soft, silty bottom free from stones. 
The water is 1 to 3 feet deep, in which such plants as Scirpus, 
Dianthera, and Pontederia live. Six species and sixteen indi- 
viduals occupy this unit area. The four habitats in type 2 
have a sandy bottom with a few stones; the water is 2—4 feet 
deep and the plant forms are Scirpus and Pontederia. 
Thirty-seven individuals of 12 species represent the maxi- 
mum (XX XI, 1, C) and 19 individuals of 5 species the mini- 
mum in point of species (V, 1). Station XXI, 2, B, con- 
tained the smallest number of individuals per unit area, 10, 
although the number of species (8) is large (Fig. 34). The 
majority of the species are bivalves (7). Habitats of the third 
type in the table have a sandy bottom without stones, the water 
is from 2—5 feet deep and the dominant vegetation is Nymphea, 
Scirpus, and Pontederia. Of the four stations represented, 
that of XIX is by far the best from the quantitative stand- 
point, and its biota is of most value from an economic stand- 
point. Two samples were obtained from this station which 
are noteworthy. In one, 98 individuals represented by 17 
species were noted; in the other 163 individuals represented 
by 11 species were observed (Fig. 35). The large number 
of Amnicola and Bythinia, as well as of other small species, 
is to be especially noted, as these are of primary value as fish 
food, especially bottom feeders, like sunfish, suckers, and 
eatfish, An example of medium density is shown by III, 
2, C, (also Fig. 36) where 12 species are represented by 
54 individuals. In Station XXXIV but 4 species repre 
sented by 10 individuals are noted. In type 4 of the table, 
the bottom is soft and sandy, there are no stones, the water 
is from 1-3 feet deep and the dominant plants are Scirpus, 
Nymphea and Sagittaria. Seventeen individuals of 3 species 
are recorded. This might be considered a fair feeding ground 
for fish. 
