VOLUME XXI NUMBER 2 
JOURNAL OF THE 
SULLIVANT MOSS SOCIETY 
Conducted and Published for the Society by 
O E. JENNINGS, PkD., Editor-in-Ckef 
Associate Editors 
ABEL JOEL GROUT, Ph D. 
GEORGE N. BEST, M.D. JOHN M. HOLZ1NGER, M S. 
ALEXANDER W. EVANS, Ph.D. LINCOLN W. RIDDLE, Ph D 
and the 
Advisory Board Officers of the Society 
CONTENTS 
Mosses as Rock Builders W. H. Emig 
Mosses from Florida Collected by Severin Rapp 
Elizabeth G. Britton 
Additions to the List of Bryophytes from Cape Breton 
George E. Nichols 
Lichens of the Berkshire Hills, Massachusetts 
Stewart H. Burnham 
“The Catkin-Hypnum with Long Hoses” Elizabeth G. Britton 
A Station of Ephemerum near New York City Daisy J. Levy 
Reviews 
Evans — “The American Species of Marehantia” 
Caroline C. Haynes 
Pottier— On the Uns>mmetric Structure of the Leaves 
of Mnium spincsum E. B. Chamberlain 
Miscellaneous Notes 
Notice to Members 
Exchange Department 
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“Entered as second-class matter August 21st, 1913, at the Post Office at Pittsburgh, 
Pennsylvania, under the Act of March 3, 1879." 
Copyright, 1918, by Edward B. Chamberlain 
The January number of THE BRYOLOGIST was published March 15. 1918 
PRESS OF THE INTELLIGENCER PRINTING HOUSE. LANCASTER. PA. 
