8 
TON, Easton, and Bethlehem, Rav; PHILADELPHIA, Wat- 
son, Fairmount Park, James; CHESTER, Michener; Lan- 
CASTER and FRANKLIN, Porter. 
S. subalpina (Nees) Dumort.—Carson, Raw. 
S. undulata Nees & Mont.—On damp ground. CaRBon, 
Stony Creek, Raw; NoRTHAMPTON, Easton, James; FRANK- 
LIN, Mercersburg, Porter. 
Radula Dumort. 
R. complanata (L.) Dumort.—On bark of trees. NorTu- 
AMPTON, Easton, forter; Bethlehem, Rau; DELAWARE 
(Smith’s Catalogue); CHESTER, James, LANCASTER, Martic 
Forge, Porter. 
R. obconiea Sull.—On rocks. Bucks, Narrowsville, James. 
R. tenax Lindb.—LenicH, Allentown, Raw; Carson, Rau; 
Monroe, Water Gap, Austen. 
Porella L. 
P. platyphylla (L.) Lindb.—On rocks and trees. Norvtu- 
AMPTON, Easton, Porter; DELAWARE (Smith’s Catalogue); 
CHESTER (Flora Cestrica); LANCASTER, Martic Forge, Por- 
ter. 
P. pinnata L.—On wet rocks in rivulets. Lenicu, Raw; 
NorTHAMPTON; Bucks, Narrowsville, James; LANCASTER, 
Porter. 
P. rivularis (Nees) Trevis.—Bucxs, Narrowsville, James. 
Lejeunea Libert. 
L. elypeata (Schwein.) Sull—On rocks. NorRTHAMPTON; 
PHILADELPHIA, James; DELAWARE (Smith’s Catalogue); 
CHESTER (Flora Cestrica); LANCASTER, Porter; Laurel 
Hill, western Pennsylvania, on the authority of Under- 
wood. 
L. echinata (Hook.) Tayl—Exposed rocks. LEnicH, Rau; 
Bucks, Narrowsville, James. 
