DIPHYSCIUM. 95 



at the head of Glen Dale in Scotland. Fr. Summer. Here 

 is a little " gem/^ brought to the light of human knowledge, 

 as far as we have any record, within the last dozen years. 

 We are wont to speak of these commodities as being borne 

 alone by the " deep unfathomed caves of ocean," but the 

 history of this little Moss may show us how very circum- 

 scribed our knowledge of objects within easy reach may be. 

 It very much resembles the Bartramia fo7itana in miniature, 

 so much so as to lead Mr. Wilson, the discoverer, to think 

 that it might be only a variety. Another species, the B. 

 Roylei, from the Himalaya and Neilgherries in India, closely 

 resembles this, but has erect capsules. From these moun- 

 tains we have also many flowering plants partaking much of 

 European types and habits. 



Subsection III. PERISTOMI. 



Division 1. JPLOPERISTOML 



DIPHYSCILM, 3Iohr. (Diphyscium.) 



Literally, two bladders or vessels, from the double mem- 

 brane of which the capsule is composed. It was united by 

 Schwsegrichen with Buxhaumla, and in the form of the cap- 



