Mr. Brown on Lyellia, Leptostomum, and Buxbaumia. 563 



lipticis, margine paulo incrassatis, disco angusto, porum 

 referente sed laminam tantuni exterioreni perforante. 



Operculum (unicum tanluni visum quod caljptra delapsain- 

 clusuni) e basi depresso-conica desinens in rostrum longi- 

 tudine circiter ipsius baseos, intus auctum processu cylin- 

 draceo, centro baseos inserto, et proculdubio disco circu- 

 lar! terminali columellee applicito. 



Teristomium horizontale, nee obliquum, clausum quasi oper- 

 culo interiori seu epiphragmate crasso, opaco, edentulo, pla- 

 niusculo, persistente; limbo latiusculo crassiore castaneo ; 

 disco pallido leviter depresso; ipso centro circulari piano, 

 crassiusculo fusco, a disco pallido mox separante, arete 

 cum columella coha3renti, eaque demum abbreviata intra 

 cavitatem retracto. 



Membrana interior (s. Theca vera) approximata exteriori, 

 quacum processubus numerosis vaseuliformibus connexa, 

 ore coarctato, spongioso-membranaceo, colkim breve colu- 

 mellse arete amplexante, superficie interiore altfe corrugata. 



Columella in capsula matura majuscula, subovalis, lacunosa, 

 rugis elevatis applicitis et forsan connexis plicis respon- 

 dentibus membranac interioris. 



Semina minutissima, in cumulo viridia, separatim hyalina, 

 Isevia. 



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 com- 

 municated. 



VOL. XII. 4 D The 



