132 Cushman : New England species of Closterium 



Massachusetts: Halifax! Lake Watuppa, Fall River! Gay 

 id, Marthas Vineyard ! Gibbs Pond, Nantucket ! 

 Connecticut: Bridgeport and Easton {Johnson, W. & G. 



West) 



47. Closterium Kutzingii Breb. 



Closterium Kutzingii Breb. /. c. 156. //. 2. f. 4.0. 1856. — Wolle, 



Desm. U. S. 47. pi. 8. f. 8. 1884. — W. & G. S. West, 



Brit. Desm. 1: 186. pi. 25. f. 6-1 1. 1904. 



Cells of medium size, 18-26 times as long as broad, nearly 

 straight, median portion of cell fusiform, both margins of about the 

 same convexity, attenuated at each end into long colorless processes, 

 apices slightly incurved, rounded and slightly enlarged ; cell-wall 

 colorless or light yellowish-brown with 10-15 striae visible across 

 the cell. 



Length 3 2 5-460 [i ; breadth 1 3-2 2 ft ; apices 2. 5-3 }i. (Plate 



4, FIGURE 13.) 



Maine: Pushau Stream {Harvey). 



New Hampshire: Pudding Pond, North Conway! Hills 

 Pond, Alton ! 



Massachusetts: Winchester! Randolph! Bridgewater! Lake 

 Watuppa, Fall River ! Westpo rt! Cedar Pond, North Falmouth! 



48. Closterium rostratum Ehrenb. 



Closterium rostratum Ehrenb. Phys. Abh. Akad. Wiss. Berlin 

 67. 1833. — Wolle, Desm. U. S. 46. //. 8. f. 1-3. 1884. 

 W. & G. S. West, Brit. Desm. 1 : 188. pi. 26. f. 1-5. I9°4- 

 Cells of medium size, 14-18 times as long as wide, slightly 

 curved, median portion fusiform, inner margin more convex than 

 the outer, attenuated at each end into long slightly incurved proc- 

 esses, shorter than in the preceding, ends slightly enlarged ; cell- 

 wall yellowish-brown with 25 or more striae across the surface. 

 Length 360-420 fx ; breadth 19-25 ft ; apices 3-4.5 /a (Plate 



4, FIGURE 14.) 



Maine: Between Orono and Bangor (W. West); Pushau 

 Pond {Harvey). 



Massachusetts: Amherst {W. West); Bridgewater! Pond- 

 ville ! Lake Watuppa, Fall River ! 



48a. Closterium rostratum brevirostratum West 



Closterium rostratum, var. brevirostratum W. West, Jour. Roy- 

 Micr. So. 1889: 17. pi. 2 . f. 9 . 1889.— W. & G. S. West, 

 Brit. Desm. 1 : 189. pi. 26. f. 6-8. 1904. 



