Freshwater Algse of S. of England. By W. & G. S. West. 481 
*7. C. littorale Gay. II. Kg. YIII. Tin. 
8. C. acerosum (Schrank) Ehrenb. General ; zygospores from 
Kingsbury, Middlesex. 
9. C. lanceolatum Kiitz. I. Ep. (with zygospores). II. Ki, 
Wh. III. B„ Do , Fh. IV. He. 
Var. paryum var. n. (PI. YI. fig. 3). 
Yar. duplo minor. Long. 183 /x; lat. 21 /x. 
III. Do., in ditch amongst Spirogyra sp. 
10. C. lunula (Miill.) Nitzsch. I. Ep. III. B., E., Ew., Pu., 
Th. IY. Ks. YIII. G., H., L. 
11. G Ehrenbergii Menegh. I. Ep. II. Ha. III. B., C, Ew, 
Fh, Pt, Wi. (with zygospores). IV. Cb. 
A pure gathering was obtained from a ditch in Roehampton Lane, 
Putney Heath, Surrey. 
12. C. Malinvernianum De Not. III. Ew, Fh. 
Forms were observed _ with rather more attenuate apices, which 
were obliquely subtruncate. Long. 284-359 a ; lat. 41-48 /x ; lat. 
apic. 7 /x. YIII. Tin. 
13. C. moniliferum (Bory) Ehrenb. General and abundant. 
14. G. Leibleinii Kiitz. I. Ep. II. Ha, No, Wh. III. Cr, 
Ew, M, Mp, Ra, Rp, Wi, Wt. Y. Go. (with zygospores). 
YI. N. VII. S. 
15. C. Bianse Ehrenb. I. Ep. III. C, D, Ew, Mp, Wi. 
YIII. H, L, T, Tm, W. 
16. G. pseudodianxi Roy. III. Th. 
17. C. parvulum Nag. General ; zygospores from Esher West- 
end and Mitcham Commons, Surrey. 
18. G. calosporum Wittr. forma major West & G. S. West. Y. 
Go. (with zygospores). 
19. G. Venus Kiitz. I. Ep. III. Ew. (very abundant in April 
1895), Mp, Pu. YI. N. YIII. G„ L. 
20. G. trochiscosporum West & G. S. West. Y. Go. (abundant 
with zygospores). 
21. G. Jenneri Ealfs. III. Bi, Mp, Pu, Th. YI. N. YIII. 
T, Tm. 
22. G. Gynthia De Not. III. Pu. VI. N. 
23. G. Archerianum Cleve. YI. N. YIII. G. 
24. G. costatum Corda. I. Ep. II. Ru. III. E, Ew, Pu, Th. 
IY. Ks. Y. Go. YI. N. YIII. G, H, HI, T, Tm. 
25. C. regulare Breb. III. Pu, not uncommon. Small forms ; 
long. 226-232 /x ; lat. 24-26 /x. 
26. G. striolatum Ehrenb. General ; pure gathering from a pool 
on Wimbledon Common, Surrey. 
Yar. orthonotum Rov. III. Dj, E, Fh, Pt, Wi. IV. Ks. 
YI.N. VII. D.‘ YIII. H, T. 
