164 THE JOURNAL OF BOTANY 
other local record for this species was in January, 1905, when it 
was found in a wood at Chiltern Green, in small quantity only. 
This station is about three miles from the Caddington Woods, 
t 
u 
wood, was for several years subsequent to 1892 generally distri- 
n earance. Since 1898 there is no recor 
for this district, and as it is a species of wide distribution, its 
reappearance would be noted with interest. . : 
omewhat analogous to the foregoing are the habits of certain 
Species that appear only occasionally, or at least are but rarely 
observed in this district. 
ubjoined is a list of the more noteworthy species that have 
been found in one localit only, and most of them on a single 
occasion during the period extending from 1892 to 1905 :— 
93-4, 
Amaurochete atra, Sundon, Beds, 190 
Enteridium olivaceum, Pepperstock, Be 
Perichena variabilis, Kitchen End, 189 
Margarita metallica, Ridgmont, Beds, 1894. 
Prototrichia Jlagellifera, Flitwick, 1894, 
Lycogala flavo-fuscum, Kitchen End, 1895, 1897, 1899. 
In contrast with the habits of those species which are rarely 
seen are others which are of general distribution, and may be found 
at nearly all seasons. Amongst these it would seem that Didymium 
s, 1896. 
1-8. 
and Lycogala miniatum. These are denizens 
and decayed tree-stumps in ancient hedgerows. Representatives 
m f ies are to | § all i 
year, except during extreme variations of temperature. Excessive 
ught and prolonged frost are potent ca 
development. 
uses in arresting their 
of 
