Cushman : New England species of Closterium 117 



Massachusetts : Lake Quinsigamond, Worcester (Stone) ; 

 South Framingham ! Lake Watuppa, Fall River ! 



* 13a. Closterium juncidum elongatum Roy & Biss. 



Closterium juncidum elongatum Roy & Biss. Ann. Scot. Nat. Hist. 

 245. 1894. — W. & G. S. West, Brit. Desm. 1 : 130. IQ<H- 

 Cells broader than in the typical form, 26-36 times as long as 



wide. 



Length 310-381/;; breadth 11.5-12/2; apices 7 ft. 



Massachusetts: Tewksbury (Lagerheim) ; Lake Watuppa, 

 Fall River ! 



13^. Closterium juncidum brevius Roy 

 Closterium juncidum var. /3 Ralfs, Brit. Desm. 172. pi. 29. /. 7- 



1848. 

 Closterium juncidum $ brevior Roy, Jour. Bot. 28 : 33 6 - l8 9°- — 

 W. & G. S. West, Brit. Desm. 1: 129. //. H- f- *5, l6 - 



IQ 04- . . 



Cells relatively broader than in the typical, 12-15 times as long 



as wide. 



19.) 



Length 165-210/i; breadth 12.5— 13-5 /^- ( Plate 3> 



figure 



I 



Massachusetts : Lake Watuppa, Fall River . 



Closterium Di 



14. Closterium Dianae Ehrenb. 



//. 5- /• xvn 



1838. — Wolle, Desm. U. S. 45- /*• 7- / 9- P L *' f' * 

 1884. -W. & G. S. West, Brit. Desm. 1: 130. & 'S- /• 



1-6. 1904. 



//. 7- /• 



Closterium acuminatum Wolle, Desm. U. b. 44- 



I884. J s. f i„ 



Cells of medium size, strongly curved, atte ™^ " ™ 

 obtusely rounded apices, the dorsal margin of each ^ n * ™^ 

 truncated and thickened ; cell-wall yellowish-brown, smooth , zygo 



*M3S^W breadth 25-31,; diameter of zygospores 

 36-40 ft. (Plate 4, figure 12.) 



Maine : Orono {Harvey, W. West), Kittery, frequent ! 



New Hampshire: Pudding Pond, North Conway . 



. . . ,ixr u/*ct\- Lake Quinsigamond, 



Amherst '™ westw *-— Q 



