1905] Cushman, Desmid Flora of New Hampshire 257 
C. LATUM Bréb. Meredith ( Wests). 
C. RENIFORME Arch., var. COMPRESSUM Nordst. Length 55 p: 
breadth 53 u: isthmus 17 p: thickness 27 p. Laconia ( Wests, H. 
J. no. 661)! 
C. OCTHODES Nordst. Length 69 p: breadth 56 p: isthmus 15 p. 
Intervale ! 
* C. QUADRUM Lund., forma Johnsoni forma nov. (C. quadrum 
Lund, forma. Johnson, Bull. Torr. Bot. Club., v. 22, 1895 (July) p. 
294, Pl. 240, f. 22). Length 44 p: breadth 40 4: isthmus 14 p. 
Plymouth (H. J. no. 359). 
* C. GRANDIFORME Schmidle, var. Americana var. nov. (Plate 64, 
fig. 5). Length 53 m: breadth 35 m: isthmus 18 p. This variety 
is considerably smaller than the typical, in other points not varying 
greatly. Species new to U. S. Pudding Pond, North Conway! 
C. SUBORBICULARE Wood. (C. ¿sthmochondrum Nordst.) Length, 
31 p: breadth 28 u: isthmus 5 4. Pudding Pond. North Conway! 
Saco Lake ( Wood). | As it seems certain that both of the above 
names represent a single species the older name of Wood should be 
retained. 
C. CYCLICUM Lund. Meredith (Johnson). 
C. AMOENUM Bréb., var. TUMIDUM Wolle. Length 40-47 p: breadth 
22-25 p: isthmus 12 u. Pudding Pond, North Conway! North 
Woodstock ! 
* C. HOMALODERMUM Nordst. Length 43 4: breadth 37 p: isth- 
mus 7 p. Intervale! 
C. PHaASEOLUS Bréb., var. ELEVATUM Nordst. Length 41 p: 
breadth 25 p: isthmus 5 q. Var. new to U. S. Pudding Pond, 
North Conway ! 
C. RECTANGULARE Grun. Length 38 p: breadth 30 4: isthmus 
10 u: thickness 18 q. Laconia occasional ( Wests). 
C. PYGMAEUM Arch., var. SCHLIEPHACKEANUM (Bréb.) W. & G. 
S. West. (C. Schliephackeanum Wolle, ’92). Laconia occasional 
( Wests). 
C. SiNosTEGOS Schaarschm., var. OBTUSIUS Gutw. Length ro p: 
breadth 8 u: isthmus 3 p: thickness 4 p. Laconia, occasional 
( Wests). 
C. ORNATUM Ralfs. Length 26-32 p: breadth 27-34 p: isthmus 
8-10 u. Pudding Pond, North Conway! Intervale! Squam Lake! 
Noone's Station ! 
