The Productivity of Fish Food in Oneida Lake 83 



is covered witli these plants which form a thick blanket in 

 many places, and fairly swarm with animal life — mollusks, 

 worms, insects, crustaceans — providing' a food supply of large 

 dimensions. Chara forms a carpet on the bottom in many 

 places, especially in the west end of th-e lower bay. Nitella 

 is also abundant in spots. 



The species of filamentous algcC, such as Cladophora, IJlo- 

 ihrix, ddogonium, and Spirogyra, cover the bottom in many 

 places and form a thick blanket. The plankton alg^e, such as 

 Rividaria, Tolypothrix, Phormidium, and Scytonema, are 

 abundant in many habitats. Diatoms, especially Gomphonema 

 and Coconeis, were noted abundantly in Cladophora and some 

 other species of algse. It is probable that a rich flora of both 

 diatoms and desmids exists in this bay and lake. 



It is of value to know the relative number of species found 

 on different kinds of bottom material. Thus on boulder bot- 

 tom there were 14 species; on gravel bottom 5 species; on 

 sand bottom 24 species; on clay bottom 13 species; and on 

 mud bottom 12 species. It will be noted that a sandy bottom 

 produced almo.st twice as many species as any other variety of 

 bottom material. Forty-one species were collected, 36 of 

 which (including two species new to science) are determined 

 specifically. The algae were identified by Dr. E. N. Transeau, 

 of the Ohio State University, Columbus, Ohio. The detailed 

 field numbers and habitat relations of the algje are shown in 

 Tables Nos. 1-15. 



List of Algae 



CHARACE/E 



Chara fragilis Linn. 

 Chara species. 

 Nitella species. 



CHROOCOCACEiE 



Aphanotheca saxicola Nageli. 



OSCILLATORIACE^ 



Phormidium ambigiium Gomont. 

 Phormidium netzii (Menegh.) Gomont. 



