EUASTRUM. L03 



elliptical, with two prominences <n each side, and excavation 

 between. 



Diameter 1 12 u.\ Length 165 u. 



Var. cuspidatum, Wolle. Plate XXIX, figs. 3, 1,5. 



This variety differs in being more depressed, squatty, in 

 having the lateral lobes cuspidate, end lobe not so wide, and 

 greater thickness to the bod} of the cell. End view (fig. 5.) 

 -how- ;i more angular figure with end lobe cruciform ; cytio- 

 il' rni punctate. 



The typical form I found in various place- in New Jersey; 

 the variety only in ;i Sphagnum bed in a pond near Newfield, 

 V w Jersey. 



The original plant \\;i- found in Sweden ; our true form 

 agr< - well in size and figure with it. 



E. \Tii.\i \n \i, Wolle. Plate \ \ V I . fig. 17. 



Small, twice as long as wide; semicells three lobed, basal 

 lobes broad, emarginate ; terminal lobe a column with nearly 

 parallel sides, apex truncate. 



I diameter ""> ". 



Rathei rare, bul I found a considerable number in Bwamp 

 pools, Bucks County, Pa., and near Ocean Beach, N. .1. 



E. I ><>\\i:i.i.ii. Wolle. Plate XXVI, fig. 6. 



Broadly ovate, somewhat longer than broad, profoundly 

 constricted in the middle, sinus linear; Bemicells trilobed; 

 basal lobes orbicularly tumid; terminal lobe semiorbicular ; 

 margin of each side armed with seven or eight short, stout, 



i - al teeth. Semicells with one larger central and four 



smaller inflations ; three of them in a series on basal part, and 

 two on the end lobe. Cytioderm punctate. 



Diameter :;s n. ; length 5 I y. 



Florida. Coll. J. Don n ell Smith. 



E. formosi m. Wolle. Plate XXVI, fig. 16. 



Nearly twice as long as broad, oval in outline; semieell 

 with six marginal lobes, apices tririd, or tridentate ; central 

 tooth erect and the other two divergent ; the sections of the two 

 basal lobules more rudimentary than the others. Cytioderm 

 smooth. 



Diameter 40 '/.. ; length 62 u. 



