The Relation of Mollusks to Fish in Oneida Lake 295 
Famity LytrHRACE®. 
Decodon verticillatus (1) Ell. Swamp Loosestrife. 
Séations II, III, VI, X, XTX, XXX, XXXI, XXXIV, 
DOEXV, XXXVI 
Famiry HatoraGmace®. 
Myriophyllum spicatum L. Spiked Water Milfoil. 
piations I, IIT; VI, X, XXIV, XXXV, XX XIX, XT. 
Famity Rusriace®. 
Cephalanthus occidentalis L. Buttonbush. 
Stations II, III, X, XXX, XXXII. 
Famity ACANTHACES. 
Dianthera americana L. Water Willow. 
Samonadly Lh, LV, Vi VI, 1X;XLb XL XL ke eX, 
meal ige XV) XX, KX MXIM to MAX. 
B. ANIMALS. 
There are without a doubt a large number of species of 
Protozoa, principally belonging to the classes Rhizopoda and 
Infusoria, living in Oneida Lake, but no attempt was made 
to collect them. The same may be said of the fresh-water 
sponges (Porifera), several species of which probably occur 
in this lake. Of the Ccelenterata, the fresh-water Hydra 
without doubt is an inhabitant of the lake but none were 
observed. 
PHYLUM PLATYHELMINTHES, 
This group of worms is represented by the free triclads 
(Planaria) belonging to the class Turbellaria, and by the 
parasitic classes Trematoda and Cestoda, both of which 
affect, the external or internal parts of fishes. Worms of this 
group were observed in Perch (Field Nos. 145, 309) and 
in a specimen of the Ling purchased in the Syracuse market. 
