NOTES. 



Antherozoids of Mosses. — Dr. Grout states that "not one 

 botanist in a hundred has ever seen these bodies in motion." I 

 think this is too sweeping a statement. I have had no difficulty 

 in finding motile antherozoids whenever I chose to look for them. 

 I have seen them in the following species: Aulacomniu))i pahisire, 

 Dicranella heteromalla, Physcomitrium turbinatum, and Bryutn 

 argenteum. It seems to me to be only necessary to study any of 

 the commoner species in some locality for several years, and watch 

 the changes in development due to variation in the seasons, and 

 the amount of moisture, to learn when and where to find them. — 

 E G. Britton. 



North American Musci Pleurocarpi, issued by A. J. Groitt, 

 Ph. D. — Dr. Grout has taken the initiative in issuing these 

 exsiccatae by beginning with several of the genera which he has 

 recently studied and monographed, and securing the aid of L S. 

 Cheney and others. It is just what is needed at the present time, 

 sets of species of certain critically-studied genera, so that those 

 who have been trying to follow the many changes and corrections 

 incident on the great stimulus which has been given to the study 

 of North American mosses by the numerous European publica- 

 tions of the last decade, shall have a chance to understand and 

 correctly appreciate these changes without the expenditure of so 

 much time and money as is necessary to ferret them out individ- 

 ually. A similar set of acrocarpous mosses will be issued from 

 the Herbarium of the New York Botanical Gardens by the work- 

 ers there, and a large accumulation of material is awaiting sorting 

 and determination from various parts of the country. Dr. Small 

 has made large southern collections, Mr. Williams has lived for 

 many years in Montana and secured many valuable specimens, 

 and there are many other sets of specimens awaiting the students 

 to come and work on them. — E. G. B. 



ILLUSTRATED GLOSSARY-Continued. 



Cribose (of the peristome teeth), perforated 

 with small apertures. (Fig. 38.) 



Ciicullate calyptra, a calyptra that is hood- 

 shaped and split on one side only. (Fig. 33.) 



Cygneous (of the seta), curved suddenly down- 

 wards like a swan's neck. 



Deoperciilate, applied to a capsule after its lid 

 7^ « has fallen ofiE. 



Dimidiate, split on one side. 

 Divisural line, the line down the teeth of a peristome, 



