298 
Transactions of the Society. 
Genus Palmella Lyngb. 
P. mucosa Ktz. C. 
P. hyalina Breb. F., C. 
Genus Chlorococcum Fries. 
C. gig as Grun. P. 
Genus Gloeocystis Niig. 
G. ampla Ktz. B., A., P. 
G. vesiculosa Nag. Do., Bettws-y-coed. 
G. rupestris Rabh. Llyn Idwal. 
G. hotryoides Ktz. C. 
Genus Schizochlamys A. Br. 
S. gelatinosa A. Braun. F., Bettws-y-coed. 
Genus Eremosplisera De Bary. 
E. viridis De Bary. C., A. 
Genus Botryococcus Ktz. 
B. Braunii Ktz. A., Penmaenmawr. 
Genus Urococcus (Hass.) Ktz. 
U. insignis (Hass.) Ktz. (Chroococcus macrococcus Eabb.). F. 
I agree with Nordstedt in considering these two as forming but 
one species. I have noticed varying forms from N.W. Ireland, 
Yorkshire, the Lake District, and Scotland. 
Genus Bhaphidium Ktz. 
R. aciculare A. Braun. C., Llyn Idwal. 
B. falcatum Corda. C., B., A. 
Genus Scenedesmus Meyen. 
S. obtusus Meyen. 0., A., B. 
S. acutus Meyen. A., 0., S., P. 
var. ohliquus Eabh. B. 
S. quadricauda Breb. A., C., Llandudno. 
Genus Polyedrium Nag. 
P. gig as Wittr. D. 
P. tetraedricum Nag. C. 
P. longispinum (Perty) Eabh. Bettws-y-coed. 
P. enonne (Ealfs) De Bary. C. 
