JOURNAL 
OF THE 
ROYAL MICROSCOPICAL SOCIETY. 
APRIL 1896. 
TRANSACTIONS OF THE SOCIETY. 
III . — On some New and Interesting Freshwater Algse. 
By William West, F.L.S., and G. S. West, A.R.C.S., Scholar of 
St. John’s College, Cambridge. 
(Communicated by A. W. Bennett, M.A., F.R.M.S.) 
{Read 19th February , 1896.) 
Plates III. and IV. 
The results embodied in the following paper have been gradually 
accumulating during the investigation of innumerable gatherings of 
material from very varied stations, and we now consider that there 
are sufficient facts to form a paper which will be interesting to the 
algologist as well as to the general and physiological botanist. The 
most interesting features of the paper are the descriptions of a new 
genus of Pandorinese, and of a new genus closely allied to Glosterium , 
EXPLANATION OF PLATES. 
[ The figures have been reduced to 10/11 ( approximately ) of their original dimensions .] 
(Explicatio iconum.) 
front view (a fronte visa), 
vertical view (a vertice visa), 
side-view (a latere visa), 
basal view of semicell (a basi visa). 
Plate III. 
Fig. 1-13. — Tetragonium lacustre gen. et sp. n. x 520. 
,, 14. — Stichococcus variabilis sp. n. x 520. 
„ 15. — Oocystis ciliata Lagerh. var. radians var. n. x 520. 
„ 16-20. — Closterium trochiscosporum sp. n. x 520. 16-18 and 20, zygospores. 
„ 21, 22. — Xanthidium Robinsonianum Arch, x 520. 
„ 23, 24. — Roya obtusa (Breb.) nob. var. montana var. n. x 625. 
„ 25, 26. — Closterium calosporum Wittr. forma major. X 220. Zygospores. 
„ 27. — Staurastrum Bieneanum Rabh. x 520. Zygospore. 
„ 28. „ orbiculare (Ehrnb.) Ralfs. x 400. Zygospore. 
„ 29. — Micrasterias denticulata Breb. x 120. Zygospore. 
,, 30, 31. — Cosmarium Regnesii Reinsch. x 520. Zygospores. 
„ 32, 33. — Conferva undulata sp. u. x 520. 
1896 
a, a , a 
b 
c 
d 
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