1897 | NOTES ON THE GENUS CALOSTOMA 183 
acter, readily hibernating without injury. Its apex protrudes as 
an umbonate elevation which has from four to seven slits radiat- 
ing from a center and dividing into a corresponding number of 
tooth-like valves, the inner surfaces of which are of a brilliant 
vermilion. The basal portion of the endoperidium forms the 
point of origin of the footstalk, which extends downward and 
breaks through the exoperidium in such a manner as to enclose 
completely patches of the red granular zone (fig. 6,d). Upon 
passing out of the endoperidium into the footstalk the hyphe 
form themselves into anastomosing gelatinous strands (jig. 6, 6) 
which give it the peculiar reticulate appearance seen in the 
mature specimens. 
The tooth-like valves already mentioned open into the spore 
sac, which is composed of hyphae somewhat smaller in diameter 
than those of the endoperidium. In the earlier stages the 
Spore sac and endoperidium are in connection throughout, but a 
Separation soon takes place, except at the apex in the region 
around the mouth where the connection between the two layers 
persists. After this separation the spore sac gradually contracts 
as the spores are discharged, so that a cavity is left between it 
and the endoperidium. 
The hyphz of the wall of the spore sac continue inward and 
form the gleba, which is of a yellowish color, and, when seen in 
cross section in its early stages, has a lobulated appearance, the 
-_cleft-like cavities between the lobules being traversed by loose 
strands of large brownish yellow branching hyphe which form 
an irregular network (fig. 5). These hyphe (fg. 7) are 3-44 
thick, with frequent septa and clamp connections, and are 
marked with irregular transverse thickenings (2). They appear 
to have no connection with the fertile hyphe; a fact which, 
together with the presence of the annular thickenings, would 
seem to indicate that they may represent a rudimentary capil- | 
litium, although I have not been able to find them after the spores 
arrive at n 
3 Die fertile Ailes are an 3 BB thick, senck branched and 
: ae ae of a ge tens color. ‘At an Ded gts of a 
