220 



Puget Sound Marine Sta. Pub. 



Vol. 1, No. 19 



Conferva bombycina Agardh in Washington 



Grace A. Hill, University of Washington, Seattle. 



Forming a yellowish or a whitish floccose mass; filaments 6-11 ju. in 

 diameter, cells cylindrical or somewhat inflated, 2-4 diameters long; cell 

 wall thin; chloroplasts small or of moderate size, several in the cell. — 

 Collected by T. C. Frye in a roadside ditch at Fauntleroy, Seattle, Wash., 

 Dec, 1916. 



The plants examined difiered from the above in that the diameter 

 was 8-12 fi, and the length of the cells 2-5 diameters. The color of the 

 mass, too, might better be described as faded green. Wolle mentions the 

 shrinkage of alternate cells in dying (Fig. 2 below) ; also the irregular 

 thickness of the filaments, which the writer's observation's confirm. 



G. A. Hill, Del. 



PLATE 38 



Fig. 1. Part of filament showing characteristic inflation of cells. 

 X 1104. 



Fig. 2. Part of filament showing peculiar alternate shrinkage. X 

 550. 



Fig. 3. Part of filament. X 450. 



Fig. 4. Part of filament showing cells dividing. X 550. 



