Rey. M. J. Berkeley and Mr. C. BE. Broome on British Fungi. 367 
which show that it is quite distinct from Stemonztis papillaia, the 
spores being produced in little heads surrounded by a common 
vesicle at the free apices of the flocci, which all spring from a dise 
at the top of the percurrent stem. No such structure exists in 
S. papillata. The genus therefore may be thus characterized :— 
Peridium simplex tenuissimum membranaceum fugax eva- 
nescens. Capillitium determinatum e membrana stipitem coro- 
nante cum peridio continua oriens. Spore globose 5—6 ad liberos 
apices floccorum conglomeratz vesicula communi circumdate. 
The structure is in Myxogastri precisely what that of Hlapho- 
myces 1s in Lycoperdinee, and would perhaps go far towards justi- 
fying the retention of that genus amongst the puff-balls, remind- 
ing one of the strange anomaly observed by Messrs. Tulasne in 
the fructification of a species of Hymenogaster and of the vesicular 
heads of Mucorint. This is almost the only case in which the 
spores of a Myzxogaster have been observed in situ ; Ptychogaster 
is the single exception, and in that Corda represents them as 
forming little heads. 
Piate XI. fig. 7. Flocci with spores and cysts highly magnified. 
389. Arcyria umbrina, Schum. Sell. vol. ii. p. 213; Fl. Dan. 
t. 1975. fig. 1. Wothorpe, Norths., on wood. 
It does not seem to have been noticed that in this genus the 
threads of the capillitium have a row of little tubercles on one 
side only, or if not confined to one side, some of them are more 
strongly developed. In some instances they form rings round 
the threads. 
390. Trichia Ayresti, n. s. Congesta; peridiis obovatis cas- 
taneo-fulvis nitidis ; stipitibus brevissimis connatis ; capillitio for- 
titer echimulato sporidusque crocato-fulvis. On decayed wood, 
Thame, Oxfordshire, Dr. Ayres. 
Forming crowded masses. Peridia obovate, shining, of a bright 
tawny chestnut. Elaters of the capillitium thicker than in 7. py- 
riformis and strongly echmulate, tawny. Spores globose, tawny. 
This differs from 7. pyriformis in the much thicker strongly 
echinulate elaters, which in that species are at first sight appa- 
rently smooth, as indeed they are represented by Corda. Trichia 
Neesiana, Corda, is referred by Fries in his ‘Summa Vegetabi- 
lum Scandinavie’ to T. rubiformis, with which view we are in- 
clined to accord. 
391. Trichia serotina, Schrad. Journ. Bot. 1799, vol. ii. p. 67. 
t. 5. fig.2. Bristol, H. O. Stephens, Esq. 
392. Licea perreptans, Berk. Effusa, demum hic illic conglo- 
merata; peridus oblongis ut plurimum distinctis; sporis atro- 
purpureis, Berk. im Gard. Chron. 1848, p. 451. Lycoperdon 
echimformis, Sow. ! Fung. t. 400. fig. 1. In great abundance in 
