Clare Island Survey — Fresh-water Algae. 16 45 



Sub-order Trichophoreae. 



Fam. Rivulariaceae. 



Calothrix fusca (Kiitz.) Born, et Flah. — L; SL, sheaths up to 13 -5/* broad, 

 trichomes 6-8'4/u. broad, 

 parietina (Nag.) Thur. — M. 

 Rivularia beccariana (De Not.) Born, et Flah. — C, abundant on stones in 

 tumbling rill on Croaghmore, many measured up to :j'5 millimetres, 

 1 mm. is the usual measurement. This was exceptionally fine in 

 one place where Trichocolea tomcntdla occurred, 

 haematites (DC.) Ag. — W. 



nitida Ag. — On rocks near Roonah Point near L. 

 echinulata (Sm.) Born, et Flah. — C ; plankton of LG. 

 [.Such plants as Rivularia atra, which always grow subject to salt-water 

 influence, I have purposely left to the marine algologist.] 



Class FLAGELLATA. 



Dinobryon cylindricum Imhof. var. divergens Lemm. — C. 

 elongatum Imhof., var. undulatum Lemm. — CP, D. 

 protuberans Lemm. — C, I, CI. 

 sociale Ehrenb.— D, VL, M. 

 Sertularia Ehrenb. — C. 



var. thyrsoideum (Chod.) Lemm. — C, CP, S. W. of D. 

 Euglena viridis Ehrenb. — C, L, W, OP. 

 *Synura uvella Ehrenb. — S. W. of D. 



Class PERIDINIEAE. 



Glenodinium pulvisculus (Ehrenb.) Stein. — C, M, I, CI, SL, Or, D. 

 Ceratium hirundinella 0. F. Miiller. — K, Ac, LG, VL. 



cornututn (Ehrenb.) Clap, et Lachm. — Or; SL, associated with abundance 



of Anwraea cochlcaris and Notholca longispina. 

 Tripos (Ehrenb.). — DL. These agreed with published figures of this 

 plant, the examples were scarce, and may have been brought to the 

 fresh-water lake (which is close to the sea) by the numerous gulls. 

 Peridinium tabulatum (Ehrenb.) Clap, et Lachm. — SL. 

 Willei Huitfeldt-Kaas.— C, As, D, SL. 



