CATALOGUE OF PLANTS. 603 
O. scopulorum (Web, & Mohr), Ag. 
Marine. Hudson: Hoboken—Pike. Atlantic: On wharves, 
Atlantic City—Morse. Cape May: Beesley’s Point—Pike. 
C. pulvinata (Mert.), Ag. 
Marine. Atlantic: On wharves, Atlantic City—Martindale. 
O. Dillwynii, Hass. 
In fresh-water swamps; frequent.* 
C. gypsophila, Kiitz. 
Fresh water. Morris: Rocky shores of Lake Hopatcong. 
C. radiosa (Kiitz.), Kirch. 
Fresh water. Morris: Morris Pond. 
C. Meneghiniana, Kirch. 
Fresh water. On submerged wood, etc.; frequent. 
C. Brebissonii, Kiitz. 
Fresh water. On stones in ponds; frequent. 
C. lacucola, Wolle. 
Fresh water. Morris: Split Rock Pond. 
MASTIGONBEMA, Fisher. 
M. wrugineum (Kiitz.), Kirch. 
Fresh water. In small ponds; common.f 
ISACTIS, Thur. 
I. plana, Thur. 
Marine. Atlantic: On stones and old oyster shells, Atlantic 
City — Morse. 
I. ceespitosa (Kiitz.), Wolle. 
Fresh water. On submerged stones in shallow water ; frequent. 
I. fluviatilis (Rab.), Kirch. 
Fresh water. Morris: Rocky margins of Green Pond. 
*C. Orsiniana of the Preliminary Catalogue is omitted as uncertain. 
+ The other species given in the Preliminary Catalogue are omitted as uncertain. 
