DESCRIPTIVE. 349 
in this country to a single locality in Wales, being extinct in Sussex) 
shows that the bryologist will find something to reward his researches 
even in so circumscribed a field. With regard to the lichens, I 
have added to my own imperfect list such species as are recorded 
for Alderney by Mr. C. Larbalestier in the last edition of Leighton’s 
Lichen Flora of Great Britain (1879) and in Crombie’s Monograph 
of British Lichens (1894). The list of Fungi shows that, although 
deficient in woodland and warm sheltered nooks and valleys, this 
island is, from a mycological point of view, more productive than 
might be supposed ; and the number of species would most certainly 
be largely increased by prolonged and critical study. 
As a collecting ground for seaweeds Alderney is inferior to the 
two larger islands by its greater exposure, and also by the want 
-of outlying ledges of rocks, which are only to be reached at the very 
lowest tides. ‘The south side is practically inaccessible: but several 
productive localities occur on the north coast, and at Longy. All 
‘the seaweeds now enumerated were collected by my wife and myself 
during the summer of 1900: and I wish to acknowledge my 
indebtedness to Mr. E. M. Holmes for kindly determining many 
critical and microscopical species. 
The following list shows the forty-five species of Alderney crypto- 
gams which have not hitherto been detected in Guernsey. Doubtless 
many of them will be found if searched for. 
Pottia crinita. Lecanora privigna. 
minutula. torquata. 
Barbula fallax. subcarnea. 
rigidula. coniopta. 
Weisia verticillata. 
Trichostomum crispulum. 
Bartramia stricta. 
Webera Tozeri. 
Hypnum fluitans. 
Jungermannia ventricosa. 
Volvaria gloiocephala. 
Coprinus atramentarius. 
Corticium caeruleum. 
Erysiphe communis. 
pyreniospora. 
Lecidea caligans. 
Normandina laetevirens. 
Verrucaria striatula. 
microsporoides. 
polysticta. 
Ulva rigida. 
Cladophora lanosa. 
Stictyosiphon Griffithsianum. 
Sphacelaria fusca. 
Poronia punctata. 
Rhytisma acerinum. 
Uromyces Polygoni. 
concentrica. 
Puccinia Menthae. 
Violae. 
suaveolens. 
Coleosporium Euphrasiae. 
Leptogium biatorinum. 
olivacea. 
Chilionema ocellatum. 
Alaria esculenta. 
Polysiphonia fibrillosa. 
Callithamnion brachiatum. 
Ceramium circinatum. 
Lithothamnion incrustans. 
Corallina mediterranea. 
