256 Rhodora [DECEMBER 
C. PACHYDERMUM Lund., forma * MINOR Nordst. Length 73 p: 
breadth 45 m: isthmus 18.5 4. Pudding Pond, North Conway! 
C.PERFORATUM Lund. Length 61 41! breadth 57 w: isthmus 34 p. 
Plymouth and Laconia ( Wests). 
C. caPENSE DeToni. Length 76 u: breadth 68—75 m: isthmus 
364: Pudding Pond, North Conway ! 
C. TAXICHONDRUM Lund., forma BIDENTULUM Lagerh. Length, 
40-42 p: breadth 40-46 p: isthmus 12-13 p. Pudding Pond, 
North Conway! Intervale! Noone’s Station ! 
C. suBNUDICEPS W. & G. S. West. Length 44 y: breadth 34 p: 
isthmus 8 : thickness 16 &. Laconia ( Wests). 
C. cosMETUM W. & G. S. West. Length 53 p: breadth 43 p: 
isthmus 13 p: thickness 28 p. Laconia (Wests, H. J. no. 672)! 
C. QUINARIUM Lund. Length 38-40 p: breadth 34-37 p: isthmus 
8-10 p. Pudding Pond, North Conway! Intervale! Mt. Moosi- 
lauke ! 
C. TRIPLICATUM Wolle. Length 53 m: breadth 39 mw: isthmus 
12.4 p. Holderness (H. J. no. 375)! and Plymouth ( Wests). 
C. POLYMORPHUM Nordst. Length 40 u: breadth 31 p: isthmus 
7 p. Intervale! 
C. Ractnorsku Lagerh. Length 44-48 m.: breadth 50-53 m: 
isthmus 20-21 q. Meredith, very rare (Jonson): Laconia, occa- 
sional ( Wests). 
C. Boeck Wille. Length 28 p: breadth 30: isthmus 7 y. 
Squam Lake! 
C. TETROPTHALMUN (Kütz) Menegh. Length 57-81 u: breadth 
53-60 p: isthmus 14-22 p. Intervale! Pudding Pond, North Con- 
way, common ! 
C. MARGARITATUM (Lund.) Roy & Biss. Length go 4: breadth 
72 p. Meredith, rare (Jonson). 
C. PSEUDOORBICULARE Cushman. Length 29-32 m: breadth 21— 
24m: isthmus 8 y, Intervale! Squam Lake! 
C. INTERMEDIUM Delp. Length 62 p: breadth 53 p: isthmus 
21 mw: thickness 33 4. North Woodstock! 
* C. Favum W. & G. S. West. Length 70 4: breadth 60 pu: isth- 
mus 21 4. Pudding Pond, North Conway! Slightly larger than the 
measurements of the type. As this species was described simply as 
North American this is its first definitely recorded locality. 
C. DENTATUM Wolle. Length 125 a: breadth 102 p: isthmus 
254. Squam Lake! 
