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METROPOLITAN PARK FLORA. 



Jf, swamp near Bear's Den, fruiting plentifully in June, 

 1893. 

 M. nummuloides, Hass. 



M, swamp near Bear's Den. 

 M. scalaris, Hass. 



M, swamp near Elm St., Medford. 

 M. quadrangulata, Hass. 



M, swamp near Bear's Den. 



CHLOROPHYCE/E. 



VOLVOX, Ehren. 

 V. globator, Ehren. 

 M, Shiner Pool. 



TETRASPORA, Ag. 

 T. Iubrica, Ag. 



M, very common in spring in running water. 



OPHIOCYTIUM, Naeg. 

 O. parvulum (Perty), A. Br. 



M, sparsely distributed among various algae. 



PEDIASTRUM, Meyer. 



P. Boryanum (Turp.), Menegh. 



M, among various algse, Hemlock Pool. 



ULOTHRIX, Kuetz. 

 U. zonata (Web. & Mohr), Kuetz. 



M, Spot Pond brook in spring. Other species of Ulothrix, 

 also species of Conferva, are common in the Fells, but specific 

 determinations are uncertain. 



CH/ETOPHORA, Schrank. 

 C. Cornu-Dama? (Roth) , Ag. 

 M, common. 



