THE GENERA OF MOSSES. 
55 
12. Operculum of Gym. fascimlare. 
13. Do. of Gym. conicum, 
14. Do. of Gym, involutum, 
15. Cellules of the leaves of Gym. Griffithianim. 
16. Do. of Gym. pyr2forme. Similar to which are 
those of Gym. Jasciculare and Gym. (Pjrami- 
dula) tetragonuin. 
17. Do. of Gym. mmutulum ; which may also serve 
to represent those of Gym. truncatulum and 
ovatum. 
18. Do. of Gym, Donianum; resembling also those 
of Gym. coniciim. 
19- Do. of Gym. Xanthocarpum. 
50. Do. of Gym. tortile. 
51. Do. of Gym. microstomum. (The smallest reticu- 
lation of any of the Gymnostoma.) 
All the figures more or less magnified. 
Gen. VI. ScHisTosTEGA, Mohr, 
Fruct. Cdlyptra mitraeformis % basi Integra, fugax, 
theca paulo brevior, tenera, pallido-fuscescens, laxe reticu- 
lata. Seta terminalis, cauli subsequalis, lutescens demum 
rufescens, erecta, capillaris, nunquam tortilis, apice paulu- 
lura incrassata. Apophysis nulla. Theca Integra, laevis, 
subglobosa, minutissima, maturitate luteo-fusca, ore con- 
tractor incrassato, thecse concolore -^ absque annulo. Oper-^ 
culum tenerrimum, convexiusculum, striato-reticulatum, 
* — " Integra secedit," Hewd. Stirp, Cr. 
t — « luteo." Hedw, Stirp. Cr. 
