80 
The structure agrees essentially with that of a 
bryophytic sporogonium. its chief characteristic being 
that the spores are formed in one concrete sporogenous 
tissue and not in separate sporangia as in the pterido-' 
pliytes. On the other hand, it is evident that the Devo- 
nian form does not fall within the limits of any of the 
existing groups of Bryophyta. The stalk cannot well 
be of the nature of a pseudopodium: for this reason 
A C 
Sporogonites exuberans nov. gen. et sp. — A. impression of stalked 
capsule, upper part deformed. — B. petrified capsule retaining its 
rounded shape. — C. longitudinal section of the same specimen. 
— D. spore. — All the drawings are somewhat diagrammatic. 
and because of its general habit, it is with the s]i>oro- 
gonium of the Brvales that our fossil should be com- 
pared. In the Bryales. however, the sporogenous tract 
is cylindrical, open at the top, whereas in the fossil 
form it continues over the columella as in the Sphag- 
nales and the Andraenles. There is no trace of any 
operculum, and it is not known how the spores were 
