264 



Ccelosphxrmm kuetzmgianum, PericUnmni tabulaUim, very abundant; 

 Chydorus, Anurxa, Botryococcus hraunii, Ccelastrum, Staurastrum 1, 

 small. Naviculas, several. 



Sample 5. August 20, 1908. Fine bluish-green material. Peri- 

 dinium tabulatiim, abundant; Cocconema cymbiforme, Navicula, a few; 

 Anuria cochlearis, Microcystis seruginosa, Chydorus, 1 entire, and other 

 fragments; Pediastrum duplex, Coelospkierium kuetzingicmum; Cos- 

 inariutn, Coscinodiscus, Scenedesmus, very common; Merismopcsdia 

 glauca. 



Sample 6. August 20, 1908. A small amount of flocculent grayish 

 material. Peridinium tabulatum, abundant, agglutinated in masses; 

 Microcystis seruginosa, very common; Navicula, Staurastrum, Cos- 

 rnarium, several; Chydorus, fragment; Scenedesmus, small forms, com- 

 mon; Pediastrum boryanum, Cocconema cymbiforme, Tetraedron, com- 

 mon; various diatoms; Rotifer, an elongate species; Merismopoedia 

 glauca; Ccelastrum, Desmids. 



Sample 7. August 21, 1908. A small amount of rather coherent 

 fine flocculent greenish material. Peridinitim tabulatum, very common; 

 Anuraea cochlearis, a few; Microcystis aeruginosa, frequent; Lyngbya 

 sestuaria, short filament; Pediastrum boryanum, Cocconema cymbiforme, 

 CymatojAcura, Epithemia argus, Gomphonema, Synedra, Tetraedron, 

 Scenedesmus, occasional; Dinobryon, StaurastnDu, rather slender form. 



Sample 8. August 20, 1908. A small amount of flocculent bluish 

 material. Peridinium tabulatum, most abundant; Ccelosphxrium kuet- 

 zingianum; Pediastrum duplex, Microcystis semginosa, Anursea coch- 

 learis, Sponge spicule. Diatoms (Navicula, Cocconema, etc.), Scenedes- 

 mus. 



Sample 9. August 20, 1908; a fair amount of flocculent grayish 

 brown material with a greenish cast. Peridinium tabulatum, most 

 abundant; Microcystis aeruginosa, Anuraea cochlearis, Staurastrum, 

 Pediastrum duplex, Botryococcus braunii; Tetraedron minimum,, Coelos- 

 phaerium kuetzingianum ; Pediastrum boryanum,, Chydorus, Lynbya 

 xstuarii, Gloeocupsa, Diatoms — Cocconema cymbiforme, Navicula. 



3. Unio gibbosus Barnes. 



This mussel, known among clammers as the "spike" or "lady- 

 finger" is, next to La^npsilis luteola, the most abundant shell in the lake. 



