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the notice that M. Husnot, the veteran editor, hopes to issue the full six issues 

 for the forty-second volume before the end of 1920. It has been necessary to 

 increase the price to 13 francs for subscribers outside of France; subscriptions 

 should be sent, as formerly, to Mons. T. Husnot, Cahan, par Athis (Orne), France. 



E. B. C. 



EXCHANGE DEPARTMENT 



To Society members only. Return postage, rather than a stamped enve- 

 lope should accompany request. 



Rev. H. Dupret, Seminary of Philosophy, Montreal, Canada. — Dicranum 

 alatum (Barnes) R. & C, c. fr., from near Montreal. 



Mr. E. B. Chamberlain, 18 West 89th Street, New York City. — Barbula 

 paludosa Schleich., st., from Switzerland, coll. Rev. P. G. M. Rhodes. 



Dr. Albert C. Herre, Bureau of Science, Manila, P. I. — Dendrographa minor 

 (Tuck.) Darb.; Dermatocarpon miniatum (L.) Mann; Diploschistes scruposus 

 (L.) Norm.; Evernia prunastri (L.) Ach.; Letharia vulpina (L.) Wain.; 

 Xanthoria lychnea (Ach.) Th. Fr. 



