242 The Ohio Journal of Science [Vol. XIX, No. 4, 



This species has larger vegetative cells than any of the 

 described species. Its position in the genus is near B. imperialis 

 Wittr., from which it differs in dimensions, in being idioan- 

 drosporous, and in the more highly ornamented spore wall. The 

 spore most nearly resembles that of B. -insignis reticulata 

 (Nordst.) Hirn. Collected by Mr. Charles Bullard in a pond 

 west of Winter Pond, Winchester, Mass., July 15, 1908. Type in 

 Herbarium E. N. T. (Plate XIV, Figs, a-e.^) 



EXPLANATION OF PLATE XIV. 



Figures a-e. Bidbochate BuUardi nov. sp. 

 Figures f-i. Oedogonium hystricinum nov. sp. 



a — Male filament showing strict habit, basal cell and five androsporangia, 

 b — Imperfect oogonium with two dwarf males, antheridia and sperms, c — Imma- 

 ture oogonium, d — Mature oogonium and oospore, e — Five androsporangia. 

 f. g. h — Female filaments showing mature oospores and dwarf males, i — Male 

 filament with androspores. Camera lucida drawings. 



