120 Cushman: New England species of Closterium 



Length 56-87 ;i; breadth 7-10.5/;. (Plate 5, figure 2.) 



Maine : Oldtown {Harvey) ; Kittery ! 



New Hampshire : Bog near Noone's Station ! Mt. Moosilauke, 



common ! 



Massachusetts : Amherst ( W. West) ; Winchester ! Reading ! 

 Wellesley ! Wakefield ! Lake Watuppa, Fall River ! Westport ! 

 Cedar Pond, North Falmouth ! Nantucket ! 



Rhode Island : Nyatt ! 



This is one of our commoner species. 



_ 



20. Closterium eboracense Turner 



Closterium eboracense Turner, in Cooke, Brit. Desm. 37. pi. 65. f. 

 1. 1886.— W. & G. S. West, Brit. Desm. 1 : 140. //. 16. f. 



7, 8. 1904. 



/. 17, 18. 1884. 



Wolle (non Ehrenb.), Desm. U. S. 40. //. 6. 



Cells of medium size, 5-6 times as long as wide, outer margin 

 strongly curved, inner margin very slightly concave, apices bluntly 

 rounded ; cell-wall colorless and smooth. 



Length 248-325 } x ; breadth 48-50/*. 



Maine : Oldtown and Orono (ff, 



Massachusetts : Amherst ( W. West) ; Stony Brook, Weston 



1 



Gay Head, Marthas Vineyard ! 



Am 



writers. 



Wolle 



21. Closterium Leibleinii Kutz. 



Closterium Leibleinii Kutz. Linnaea 8 : 596. //. 18. f. 79. 1834- 



Wolle, Desm U. S. 46. pi. 7. f. i 3 , i 4> 20. 1884.— W - 



West 



141. pi. 16. f. Q-14. I9°4 



Cells of medium size, strongly curved, 5-6 times as long as 

 wide, apices acutely rounded ; cell-wall colorless and smooth. 

 Length 11 2- 190//; breadth 18-34//. (Plater figure 9.) 



Mai 



Massachusetts: Amherst (W. West); South Framingham! 

 Winchester ! Myricks ! East Bridgewater ! Cedar Pond, North 

 Falmouth ! Eastham, abundant ! Nantucket ! 



Rhode Island : near Providence (Bailey) ; Nyatt ! 



