6 . INTRODUCTION 



H. S. indicates specimens in the herbarium of the Long Is- 

 land Historical Society, now in charge of the Brooklyn Botanic 

 Garden. 



To save space the following abbreviations have been used: 



"E. G. B.," for Mrs. E. G. Britton. 



"R. S. W.," for R. S. Williams. 



"Sanial," for Miss Marie L. Sanial. 



"Hulst," for the late Rev. Geo. D. Hulst. 



"Latham," for citations from the list of mosses published in 

 the Flora of Southold and Gardiner's Island by S. H. Burnham 

 and Roy A. Latham in Torreya for November, 19 14. 



"N.Am. Flora," for North American Flora, vol. 15, published 

 by the New York Botanical Gardens. 



"Bx!" means that the specimen is in the collections of the New 

 York Botanical Gardens at Bronx Park. 



"Flora N. J.," refers to Britton's Preliminary Catalogue of the 

 Flora of New Jersey, Rutgers College, 1881. The mosses were 

 listed almost exclusively from the collections of C. F. Austin. 



"Flora L. Id.," refers to The Flora of Long Island by Smith 

 Ely Jelliffe. Lancaster, Pa. 1899. 



"Mosses S. Id.," refers to a Preliminary List of the Mosses 

 of Staten Island by Elizabeth G. Britton. Proceedings of the 

 Natural Science Association of Staten Island, Special No. 10, 

 July, 1890. 



"Bry. Ct.," refers to the Bryophytes of Connecticut by Evans 

 and Nichols. 



"Geol. Survey, N. J.," refers to a list of mosses by E. A. Rau 

 and E. G. Britton, published in the Geological Survey of New 

 Jersey in 1889. This also is founded on Austin's collections but 

 differs in some respects from the earlier list by Britton. 



The keys and descriptions are mostly taken from the author's 

 two manuals, "Mosses with a Hand-lens," and "Mosses with 

 Hand-lens and Microscope." The photographs are selected 

 from a large number which are to appear in the third edition 

 of "Mosses with a Hand-lens" now in preparation. The season 

 when the spores mature is indicated in most cases by a word 

 denoting the season. 



