CLASS. GENUS. SPECIES. REFERENCES. LOCALITIES. 
Fresh-water. 
Insecta. Phrycanea.*^ ....... . . Lewes Levels. 
ORGANIC REMAINS OF SUSSE.X. 
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The indusia or cases of the larva? of this genus of insects, with minute shells of the genera Planorbis, Limnea, &c. ad- 
hering to them, are very abundant in the silt or blue clay. 
>> Still inhabit the rivers and ditclies. « Exist in the neighbouring ocean. 
J The entire skeleton. A species allied to the Canadian, figured by Cuvier. 
