34 Transaclions British Myculogical Society. 



arise from a single leaf. It may do so if the leaf is near 

 the surface, in which case the sandy cord is seen to be directly 

 connected with a weft of hyphfe mixed with sand particles 

 which surrounds the dead leaf. In the majority of cases the 

 points of origin are more deeply seated. The " root " tapers 

 to about the thickness of medium twine, and then, if great 

 care has been taken in excavating, is found to fork or branch 

 repeatedly. It is as a rule impossible to trace the ultimate 

 ramifications on account of their fineness and fragility, but 

 in a few cases I was successful in tracing a branch to a dead 

 Ammophila leaf, which was covered by a fine weft of hyph^e. 

 It appears therefore that the mode of nutrition of Psilocybe 

 annnophila, though on a much smaller scale, is similar to 

 that of Collybia pJatyphylla, in which a single sporophore 

 is connected by a complicated branching system of under- 

 ground cords with various decaying twigs, leaves, etc. 



Geopyxis ammophila Sacc. of which an interesting 

 description was published by Trail in the Annals of Scottish 

 Natural History, 1893, pp 37-^0, is probably similar in its 

 mode of life. This species was noted by Trail to have an 

 elongated " rooting stem," which is exceedingly fragile. In 

 this case the grass with which it was associated was Elymus. 



Coprinus Friesii Quel. 



Another interesting Agaric found in July was a small 

 species of Coprinus, apparently C. Friesii Quel. This occurred 

 in one of the numerous hollows in these dunes which are 

 liable to inundation at spring-tides from the overflowing of 

 a small stream. In the bottom of such hollows the only 

 phanerogamic vegetation is usually Juncus maritimus with 

 occasional plants of Glaux maritima. 



The Coprinus grew gregariously in patches, on the slopes 

 of the tiny sand-hillocks formed round the tufts of Juncus. 

 At first sight it appeared to be growing from the sand, but 

 on investigation it was foimd that the clusters of fruit-bodies 

 always arose from the dead stems of the Juncus, exactl}' 

 at the surface of the sand. Hitherto I have only found this 

 fungus on one occasion, which was on the day after a whole 

 day's rain. The sand beneath the surface and the buried 

 Juncus stems were saturated with moisture. On returning 

 to the same spot a few davs later, after a dry interval, I was 

 only able to see a few shrivelled fruit bodies. 



This fungus agrees well in macroscopic characters and in 

 habitat with Ouelet's original description of C. Friesii; it 

 also agrees in micro-characters with Lange's description in 

 his monograph of the Coprini of Denmark and with the 



