Cushman : New England species of Closterium 131 



44. Closterium intervalicola Gushman 



Closterium intervalicola Cushman, Rhodora 7 • I! 5- pi- & 1 - /• J - 

 1905. 



Cells rather small, about 10-12 times as long as wide, median 

 portion nearly straight, but the ends decidedly curved, very slightly 

 attenuated to the squarely truncated apices ; cell-wall yellowish- 

 brown with about 6 coarse striae across the surface. 



Length 168/1; breadth 1 5. 5/1; apices 6//. (Plate 5, figure 5.) 



New Hampshire : Intervale ! 



*45. Closterium Novae- Angliae sp. nov. 



Cells large, very elongate, 30-35 times as long as wide, very 

 slightly curved, median portion straight, gradually attenuated to 

 the incurved ends, ventral margin slightly tumid for a large part 

 of its course near the middle, apices obtusely rounded ; cell-wall 

 yellowish or reddish-brown with a thickening and consequent 

 darkening at the apices, 6-8 striae across the surface changing to 



granules near the apices. 



Length 930-1080// ; breadth 28-30// ; apices 9-1 1 //. (Plate 



4» figure 1.) 



Massachusetts : Lake Watuppa, Fall River ! 



This is one of the longest species recorded for this genus, being 

 exceeded slightly by C. mourense Playfair, which is however 3-4 

 times as wide. This is near C. Calamus Playfair. 



46. Closterium decorum Breb. 

 Closterium decorum Breb. Mem. Soc. Sci. Nat. Cherbourg 4: 

 151. PL 2.f. 39 . 1856.- Wolle, Desm. U. S. 43- P L 7- /• 

 /. 1884. — W. & G. S. West, Brit. Desm. 1 : 184. pl> H- /• 





Pi- 



7, 8. 1 904. 



C Delpontei Wolle, Bull. Torrey Club 12: 2. 1885; 



Alg. U. S. 25. pi. 55- / 9- l88 ?; Desm> U ' S - 45 ' 

 /• 9- 1892. . 



Cells large, 12-16 times as long as wide, median portion of 

 inner margin tumid, outer margin moderately curved, g ^dually 

 attenuated to the truncately rounded apices; cell-wall yellouish- 

 brown, with 1 5-18 striae across its surface. 



Length 325-540/.; breadth 24-48/^ apices 6-9/'- ^late 

 4, figure 2.) 



Maine 



W 



New Hampshire: Pudding Pond, North Conway! North 



