Clare Island Survei) — Fresh-ivater Algae. 16 37 



Asterionella formosa Hass. — C, K, VL, W. 



gracillima Heib. — Plankton of Eoonah Lough near L. 



Tribe Fragilarieae. 



Fragilaria capucina Desm. — SL, L; D, 35-55 x 11'9-14 - 7(U, girdle-view ; GP, 

 32-55^ long ; M, 33-61^ long ; Ac, W. 

 mutabilis (W. Sm.) Grun.-C, SI,, W, L, IT, LG, VL, CI, B, D, CP. 

 virescens Ealfs. — 0, L, I, "W. 

 construens (Ehrenb.) Grun. — C. 

 *Harrisonii ( W. Sm.) Grun. — D. 



Tribe Meridioneae. 

 Meridion circulare (Grev.) Ag. — G; CP, 26 x lLu apex of valve-face; 

 W, 30-38 M long; D. 



Tribe Diatomeae. 



Diatoma vulgare Bory. — L, CI, D. 

 anceps (Ehrenb.) Grun. — W. 

 elongatum Ag.— C, 46-51x5-5^, girdle-face; L, CI, W, LG, VL, CP; 



D, 60 x 5'6|U, girdle-face ; Croaglrmore cliffs. 

 hiemale (Lyngb.) Heib. — S. 



var. mesodon (Kiitz.) V.H. — S ; CP, some only 13^ long; D. 

 var. tenue (Ag.) V.H.— C, L. 

 Denticula tenuis Kiitz.— C, SL, LG, D. 



var. iniata (W. Sm.) V.H.- C. 



var. frigida Kiitz. — C, in several places. 



Tribe Tabellarieae. 



Tabellaria flocculosa (Roth) Kiitz. — C, L; W, 22 x 6,u (valve-view) ; Ac, K, 

 M, IT, SL, I,B, D, Cr, CP. 

 fenestrata (Lyngb.) Kiitz. — C, 57-5 x 4 - 5, valve-view, average size ; L, 

 W, Ac, L>, W, LG. 



Tribe Surirelleae. 



Cymatopleura Solea (Breb.) W. Sm. — W, D. 

 Surirella apiculata W. Sm. — W. 



biseriata Breb.— C ; W, up to 197 x 57 ; 5ju; M ; SL, 144 x 50ju. 



elegans Ehrenb. — C, 201 x 65/x. 



linearis W. Sm. — W. 



