206 H. Mohl on the Formation of the Stomata. 



Polytrichwn juniper inum. St. Faith's Heath (Seaming Fen). 



{urnxgerum . GiUingham . ) 



Orthotrichum cupulatum. Trees, Lakenham. 



" (Hutchinsia. Ruins of the Garianonum, near Yarmouth.) 



Anomodon viticulosum. Armeringhall Wood. 



{curtipendulum. Fakenham Heath.) 



Bryurn, argenteum. Walls and moist ground everywhere. 



nutans. Hedge-banks : rather rare. 



roseum. Moss wold, Bramerton. 



hornum. Drummond's Grove, Thorpe, Lakenham. 



cuspidatum. Drummond's Grove, moist lanes : frequent. 



Buxhaumia aphylla._ Sprowston, Sir W. J. Hooker. 

 Leucodon sciuroides. Lakenham, on trees and walls. 

 Daltonia heteromalla. Lakenham, on trees. 

 Fontinalis antipyretica. The Yare and Wensum. 

 Hypnum complanatum. Hawthorn fences. 



lutescens. Bramerton. 



.^ albicans. Moss wold. 



alopecu7'um. Armeringhall. 



proliferum. Armeringhall, Lakenham Hall Wood. 



stellatum. Bogs and marshes. 



triquetrum. Heaths and woods : abundant. 



squarrosum. Lanes and woods : frequent. 



palustre. Marshes. 



scorpioides. Marshes and bogs. 



moUuscum. Markshall, hedge-banks. 



(dendroides. Fakenham.) 



Hepatice. 



Riccia crystalUna. Banks at Bixley and Armeringhall, turnip- and 



clover-fields : frequent. 

 Sphcerocarpus terrestris. Banks at Bixley and Armeringhall, turnip- 



and clover-fields : frequent. 

 Marchantia polymorpha, conica, hemisph^erica. Walls and banks, 



river-side, &c. : frequent. 

 Jungermannia bicuspidata. Damp lanes and woods : frequent. 



complanata, dilatata. Trees: frequent. 



connivens. Bogs, among Bryums. 



pinguis. Ditches and bogs : frequent. 



{asplenioides , tamarisci. Ruins of the Garianonum, near 



Yarmouth.) 



XXVIIL — On the Formation of the Stomata, By Hugo 

 Mohl. (Linnaea, 1838, p. 544, with a Plate.)* 



M. MiRBEL is the only person, so far as I know, who, in 

 his memoir on Marchantia pqlymorpha, has published any 



* From the translation in the Annales des Sciences Natnrclles, April 

 1810, p. 222. 



