Mr. Brown on Lyellia, Leptostomum, and Buabaumia. 563 
~ lipticis, margine paulo incrassatis, disco angusto, porum 
referente sed laminam tantum exteriorem perforañte. . 
Operculum (unicum tantum visum quod calyptra delapsa in- 
clusum) e basi depresso-conica desinens in rostrum longi- 
tudine circiter ipsius baseos, intus auctum processu cylin- 
draceo, centro baseos inserto, et proculdubio disco circu- 
lari terminali columelle applicito. 
Peristomium horizontale, nec 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 plano, 
crassiusculo fusco, a disco pallido mox separante, arcte 
cum columella coherenti, eaque demum abbreviata intra 
cavitatem retracto. | 
Membrana. interior. (s. 'Theca vera) approximata exteriori, 
quacum processubus numerosis vasculiformibus connexa, 
ore coarctato, spongioso-membranaceo, collum breve colu- 
melle arcte amplexante, superficie interiore alt? corrugata. 
Columella in capsula matura majuscula, subovalis, lacunosa, 
- rugis elevatis applicitis et forsan connexis plicis respon- 
dentibus membrane interioris. — | : 
Semina minutissima, in cumulo viridia, separatim hyalina, 
levier + e 
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. À D 
The 
