The Relation of Mollusks to Fish in Oneida Lake 245 
Hyella fontana Hiiber and Jadin, 
“ Seattered through the shells, sometimes in rather dense, 
chroococoidal masses, sometimes in loosely branching’ fila- 
ments. Like the Plectonema, it penetrates the interior of 
the shells” (P. 95). 
Gomontia holdeni Collins. 
“In old shells of Unio. The plant occurs only in small 
quantity, and is almost always covered with a dense mass of 
Plectonema, so that it is very difficult to examine” (p. 96). 
Syctonema myochrous Ag. Dichothrix hosfordic (Wolle) 
Zonet. Microcoleus lacustris (Rab.) Farlow. 
Alge growing on the outside of the shells (p. 96). 
Tolypothrix setchellic Collins. 
An alga growing on the outside of the shells (pp. 96-97). 
It is not stated on what species of Unio these algee were 
found but it probably included Elliptio complanatus, this 
being the common clam of Connecticut. In Oneida Lake 
many of the bivalves and snails are similarly affected, inelud- 
ing Campeloma, Lymnaea, Elliptio, and Margaritana. 
Material has been submitted to Mr. Collins who will report 
later on the algze found on and in the Oneida Lake shells. 
11. Taste or Antmats FeEEpInc Upon Mo.Luvusks 
In the Table No. 16 it will be noted that the mollusks are 
used as food by seven groups of animals: Insects, 6 or more 
species; crawfishes, 1 or more species; leeches, 8 species; 
snails, 2 species; frogs, 3 species; and salamanders, 5 species ; 
turtles, 7 species; birds, 6 species, and mammals, 3 species, 
a total of upwards of 41 species. It is highly probable that 
this number will be very greatly increased when more care- 
ful and detailed studies are made of the food habits of other 
species, especially among aquatic invertebrates. Nineteen 
species of mollusks have been definitely identified from the 
stomach contents of these species. A study of the table will 
indicate how meagre our information on this subject is at 
present, and what a fertile field les before the investigator. 
