114 Rhodora [June 
* Var. INTERRUPTUM W. & G. S. West. New to U.S. (H.C. no. 
116.) Length 120 mw: breadth 22 u. Pudding Pond, North Con- 
way ! 
P. MARGARITACEUM (Ehrenb.) Bréb. Length 150 p: breadth 22 
u. Intervale! Pudding Pond, North Conway! Plymouth (Wests), 
Their specimens did not show the linear arrangement of the 
markings. 
P. POLYMORPHUM Perty. Length 50 4: breadth 20 pw. Pudding 
Pond, North Conway, occasional ! 
P. miNuTUM (Ralfs) Cleve. (Docidium minutum, Penium minu- 
tum, Calocylindus minutum, Wolle '92.) 
* VAR. ELONGATUM W. & G. S. West. Length 372 p: breadth 
9 p. Variety new to United States. (H. C. no. 115.) Pudding 
Pond, North Conway ! 
Roya W. & G. S. West. 
R. oBTUsA (Bréb.) W. & G. S. West. (Closterium obtusum, 
Wolle'92.) Length 150 4: breadth 15 q. Pudding Pond, North 
Conway ! 
CLOSTERIUM Nitzsch. 
"C. CYNTHIA DeNot. Length 140 m: breadth 15.5 q. North 
Woodstock ! 
C. DIDYMOTOCUM Corda. Length 400-403 p: breadth 25-34 m: 
apices 13 q. Intervale, common! Mt. Moosilauke ! 
C. MACILENTUM Bréb. Length 527 p: breadth 15.5 pm: apices 
6 uh. Intervale | 
* Forma INTERMEDIUM Racib. Form new to U. S. (H. C. no. 
114.) Length 200 m: breadth 8.5 p: apices 5 4. Pudding Pond, 
North Conway ! 
C. ANGUSTATUM Kütz. Var. CLAVATUM Hastings. Length 650 p: 
breadth 28 u: apices 16 q. North Woodstock ! Rochester (¿Zast- 
ings). Saco Pond (Wood). Hanover (Edwards). 
C. cosrATUM Corda. Length 340-410 pu: breadth 38-44 y. 
Pudding Pond, North Conway ! 
* Var. Westii var. nov. (C. costatum, forma: W. & G. S. West: 
Trans. Linn. Soc. Lond. (Bot.) v. 237. t. XIIL f. 23, 24). Length 
230-300 p: breadth 25-32 w: apices 10-12 y. Cells only slightly 
