334 ON LYELLIA, LEPTOSTOMUM, 



planiusculo, persistente ; limbo latiusculo crassiore castaneo ; 

 disco pallido leviter depresso ; ipso centro eirculari piano, 

 crassiusculo, fusco, a disco pallido mox separante, arete emu 

 columella cohaerenti, eaque demum abbreviata intra cavita- 

 tern retracto. 



Membrana interior (s. Theca vera) approximata exteriori, 

 quacum processubus numerosis vasculiformibus connexa, 

 ore coarctato, spongioso-membranaceo, collum breve colu- 

 mellas arete amplexante, superficie interiore alte corrugata. 



Columella incapsulamatura majuscula, subovalis,lacunosa, 

 rugis elevatis applicitis et forsan connexis plicis responden- 

 tibus membranse interioris. 



Semina minutissima, in enmulo viridia, separatim hyalina, 

 laevia. 



Lyellia crispa was lately discovered in Nepaul (probably 

 in the vicinity of Kathmandu,) by the botanical collectors 

 sent from the Company's garden at Calcutta, by Dr. 

 Nathaniel Wallich, the worthy successor of Dr. Roxburgh 

 in that establishment. 



The specimens here described were received from Dr. 

 Wallich by Sir Joseph Banks ; and I have also seen others 

 sent at the same time to Mr. Lambert, part of which he 

 very liberally communicated. 



664] The whole number of capsules examined does not 

 exceed twenty-five ; but as all of these were ripe and of 

 uniform appearance and structure, they will probably be 

 considered sufficient for the establishment of the genus. 



To complete the description of Lyellia, male flowers, 

 which, however, probably resemble those of Folytrichum 

 and Baiosonia, are still wanting ; and although there is no 

 reason to doubt that the calyptra and operculum, both of 

 which I have ventured to describe from fallen specimens, 

 really belong to this species, yet it would be more satisfac- 

 tory to find them while still attached to the capsule ; for in 

 this state only the form of the operculum and its probable 

 central connection with the orbicular disk of the peris tomium 

 can be absolutely determined. It will be necessary also to 

 examine a greater number of specimens, and perhaps in 



