ADDITIONAL BRITISH DESMIDS. 
39 
Fenium Nageli, Breh. 
Sutton Park, near Birmingham. 
Spondylosium pulchellum, Archer, 
N. Wales. 
Spondylosium pygmaeum, (Rahh.) Glee. 
Barmouth, N. Wales. 
This is decidedly a Spondylosium, with a hyaline sheath, but it 
is as equally certain that the Cosmarium tinctum, flalfs., which is 
called a Spondylosium by Rabenhorst, and other Continental 
authors, is not a Spheerozosma or Spondylosium, but a good Cos- 
marium. And we very much doubt if Cosmarium pygmaeum. Archer, 
is any other than a Cosmarium, although called Spheerozosma by 
Rabenhorst. Mr. Archer is too critical and experienced an 
observer to have made such a mistake. This Desmid, however, 
may throw some light upon the subject. It has probably been 
confounded with the true Cosmarium pygmcmim, Ar., from which, 
notwithstanding its uniform size and appearance, we are disposed 
to regard it as distinct. At any rate, without stronger evidence 
than we yet possess, we cannot exclude the Cosmarium from our 
list. The present Spondylosium even when divided up into the 
Cosmarium form, still retains evidence of the hyaline sheath. Faint 
radiating lines, which are liable to be mistaken for cilia may, 
almost invariably, be observed, and these are evidently the margins 
or thickenings in the sheath. This may be verified by the intro- 
duction of aniline solution, or some coloured fluid. 
Cryptogamic Society of Scotland. — The Sixth Annual Con- 
ference will be held in Glasgow, on September 27th-30th, and 
October 1st and 2nd, 1880, when all persons interested in Crypto- 
gamic Botany are invited to attend. 
CRYPTOGAMIC LITERATURE. 
Braithwaite, Dr. R. British Moss Flora. Parts 1-2. 
Thumen, F. Fungi aliquot novi in terra Kirghisorum a Juliana 
Schell lecti, in “ Nuovo Giorn. Bot. Ital.,” July, 1880. 
Jatta, a. Lichenum Italias meridionalis, manipulus tertius, in 
“ Nuovo Giorn. Bot. Ital.,” July, 1880. 
Just, Dr. Botanischer Jahresbericht (for 1878), Vol. vi., part 1. 
Thuemen, F. Contributiones ad Floram Mycologicam Lusi- 
tanicam. Pt. 2. (Reprint). 
Peck, C. H. Thirty-first Annual Report of the N. Y. State 
Museum of Nat. History. 
White, T. C. On the Resting Spores of Protococcus pluvialis, 
in “ Journ. Quekelt Micro. Club,” May, 1880. 
