292 NOTES ON BRITISH DESMIDIE. 
Z. octocorne Ralfs. 8. — ‘‘ Old Road,” aporne.. Zygospores 
have been seen here by Mr. Roy; only station kno 
Staurastrum Meriani Reinsch. — This 1 have aoa in many 
Scotch aehennge always isolated. 
S. aearides Nordst., ‘Desmid. Spetsb.,’ 1872.— Alva Glen, 
Stirling, A Croall. This is a most interesting addition to our 
British list ; it differs slightly from Nordstedt’s form, beta rather 
longer in proportion to its breadth than his. 
S. orbic Sete (Ehr.) Ralfs, 8. extensum Nordst. — Den of Gight, 
zygospores ; in ovations stratum on rocks. 
= pitoswn Soe f. minor. Supa d, Wilts. 
S. Maa e Arch. == S..p eudocrenatum Lund. — Birse Mor re, 
Aboyne, boo Mpricphyliam oes. J. Roy. A very in tenga 
and unique species. 
8S. pileolatum Breb.—Den of Garrol; Bovey Tee: isi: 
S. Capitulum 8. amenum Hilze. —Stra chan; Dartm 
Peninm lagenaroides Roy, n. sp.—lIsle of Arran. 
P. crassiusculum De By.—Craigendennie Rocks, N. B. 
P. spirostriolatum Barker.—Derrytrasna Bog, Co. Armagh. 
. (CyninpRocistis) spinospermum, mihi.—Derrytrasna Bog, 
Co. Armagh. Has long been known as an isolated form, but t 
h 
sometimes inte agar as in margaritiferum, which has a evil 
of oo on its surfac 
ands, eg that time its sygospore is unknown. 
569, Witir. & Nordst. ‘ Alge Exsiceate, fase 
ocidium coronatum Breb._-Among eae Bangor. 
Spherozosma (Spondylosium) pulchellum Arch. — Fyvie, on 
mosses. Showing the stipitate form of plant. 
Spondylosium) filifo Slewdrum 
Cosmocladium constrictum Arch.—Aboyne, J. Roy. This singular 
species I have found before.at Penzance attached i in _ lg groups. 
Also a doubtful C sick a minute species with ripe zygospores 
abundant. It appears to differ from Cosmocladium in that the 
connecting threads are ticle: not double as in that genus. 
. sawonicum Rabt.—- This has been oan, by Mr. ior) in _ 
locality as above, but I have not hitherto seen specim 
our present knowledge of this Picea it will hold sees ety a 
true position among Desm idiee 
