Freshwater Mgse of North Wales. By Wm. West. 279 
As I do not want to make a repetition of lists, I enumerate none 
of the species that were recorded in the list of Mr. Wills, except where 
they are from new localities. 1 have seen, from other localities, all 
comprised in his list, except the fourteen species and one variety which 
follow : — 
Desmidium cylindricum Grev. {JDidymo'prium Grevillei Ktz.), 
Micrasterias oscitans (Hass.) Ealfs, M. pinnatifida (Ktz.) Ealfs, 
M. angulosa Hantsch, Euastrum hinale Ealfs var. angustatum 
Wittr., Cosmarium Nijmannianum Grun., G. variolatum Lund., 
C. Holmiense Lund. var. laeve N. & W., C. cambricum Cke. & Wills, 
C. coronatum Cke. & Wills, Closterium attenuatum Ehrb., Penium 
Ndgelii Breb., Staurastrum Iseve Ealfs, S. cristatum Nag., S. grande 
Buln. 
Dr. Cooke also records the following for “ North Wales ” or 
Wales” in his British Desmids : — Desmidium quadrangulatum Ealfs 
(“Wales ”), Closterium Pritchardianum Arch. (“ Wales 
Crux-melitensis (Ehrb.) Meneg. (“Wales”), Euastrum rostratum Ealfs 
(“ Wales ”), Cosmocladium saxonicmn De Bary, Cosmarium pseudo- 
nitidulum Nord. var. ohsoletum, C. here Eabh. var. septentrionale 
Wille, G. Turpini Breb. and var. cambricum Josh., Calocylindrus 
attenuatus (Breb.) (“ Wales ”), G. turgidus (Breb.) Kirch. (“ Wales ”), 
Staurastrum furcatum (Ehrb.) Pritch. var. candianum Delp., 
S. subcruciatum Cke. & Wills. 
I also saw the following species from Capel Curig, which are not 
new records, but are here enumerated to make this list as complete 
as I am able : — Sphserozosma vertebratum Ealfs, Docidium nodosum 
Bail., Spirotsenia obscura Ealfs, Micrasterias fimbriata Ealls, 
M. radiosa Ag., Euastrum gemmatum Breb., Calocylindrus connatus 
Kirch., Staurastrum megojcanthum Lund., S. aristiferum Ealfs, 
S. Sebaldi Eeinsch, S. vestitum Ealfs, S. longispinum Bail., S. bra- 
siliensis Lund., S. Ophiura Lund., S. Cerastes Lund., S. Artiscon 
(Ehrb.) Lund., S. furcigerum Breb., S. arachne Ealfs, S. tetracerum 
Ealfs, Dimorphococcus lunatus Braun, Coelastrum cambricum Arch., 
Characium Sieboldi Braun. 
I therefore believe that the following list, together with the 
species just enumerated, will form a tolerably complete list of those 
species of Freshwater Algae hitherto observed for North Wales. 
The classification here adopted is a modification of the one in 
Bennett and Murray’s ‘ Cryptogamic Botany’; it has been selected 
after much consideration, and practically differs but little from their 
arrangement ; it is also not very far removed from that of Goebel. 
Satisfactory linear arrangement seems iurpossible. 
The many examples of Micraste^’ias furcata Ag. which were seen 
agreed well with the figures given by Ealfs, but none were seen which 
tallied with those in Cooke’s ‘ British Desmids.’ An example was 
observed which had been dividing, and which had the new half 
approaching very closely to M. Crux-melitensis (Ehrb.) Meneg. 
II 2 
