HELEOPLANKTON OF THREE BERKSHIRE POOLS, 11 
West & West. 1909. — Brit. Freshwater Phytoplankton. | Proc, Roy. Soc., B. vol. Ixxxi. 
pp. 165-206, 
West, G.S. 1909,— i. Alge of Yan-Yean Reservoir, Victoria. Journ. Linn. Soc., Bot. 
vol. xxxix. pp. 1-88, 
1909.—ii. Peridinieæ of Sutton Park. New Phytol. vol. viii, pp. 181-196. 
1904.—British Fresh-water Alge. Cambridge (University Press). 
1916.-—Algæ. Vol. i. Cambridge Botanical Handbooks. 
DESCRIPTION OF PLATE 1, 
. Peridinium Suttoni: ventral view. x 1200, 
" ^" dorsal view. x 1200, 
» » apical view. x 1200. 
» antapical view, x 1900. 
$t . 
. Diagrams of lates of valves: 1’-4' apicals; la, apical intercalary: ]".6" re- 
© H I ’ P J , 
cingulars ; P., apical pore ; 1"-5", posteingulars ; 1""-9"" antapicals ; v.g., ventral 
groove, ° 
+ Peridinium bipes: ventral view of form with dentate spines. x 650, 
. Lagerheimia wratislaviensis, x 650. 
+ Lhizosolenia longiseta : three Specimens, x 650, 
» Radiofilum conjunctivum. x 650, 
. Crucigenia Tetrapedia, x 650. 
» minima, x 650. 
