Clare Island Survey — Fresh-water Algae. 16 39 



Nitzschia Sigma W. Sm. — L, in several places, also in brackish water, mouth 

 of Bunowen River with Navicula digitoradiata ; B, W. (C, N, E, 

 also, in sea-water). 



var. rigida (Kiitz.) Grun. — C, I M, Croaghmore cliffs. 

 Tryblionella Hantzsch. var. littoralis (Grun.) V.H. — C. 



var. Victoriae Grun. — AS. 

 thermalis (Kiitz.) Grun.— L, D ; G, 82'5 x 11%. 

 *vermicularis (Kiitz.) Grun.— C, L ; M 196 x fy ; IT, I, CI ; W, 96 x 4S,i ; 



B ; W, 166^ long, girdle-face 10// broad. 

 *vitrea Norman. — W, 81 x 166// (girdle-view). 

 sinuata (W. Sin.) Grun. — L, C. 



Division III. CRYPTORAPH1DIEAE. 

 Tribe Melosireae. 



Melosira varians Ag. — C, mostly 12-12'5/t broad in one locality, in another 

 30-31,11 broad; VL, D ; W, 15-30// broad; CP ; Cr, 21// broad 

 average size. 

 granulata (Ehrenb.) Ralfs. — D, among Hippuris vulgaris; C. 

 Cyclotella operculata Kiitz.— C, L, B. 



meneghiniana Kiitz. — C, 13-13 - 5// broad; L, 15// broad. 

 kuetzingiana (Thw.) Chauvin. — W, 16// broad. 

 comta (Ehrenb.) Kiitz. — W. 



var. radiosa Grun. — W, 43-45// broad. 



Class MYXOPHYCEAE (Cyanophyckak) 

 Sub-Class I. Glaucocystidkae. 

 Glaucocystis nostochinearum Itzig. — L. 



Sub-Class II. Archiplastideak. 



Order I. COCCOGONEAE. 



Fam. Chroococcaeeae. 



Chroococcus limneticus Lemm. — K, D, VL; DL, S-10/i broad. 



*membraninus (Menegh.) Nag. — (J, usually quadrigeminate and distinctly 



angular. Agrees with Kiitzing's original figure. 

 *macrococcus (Kiitz.) Rabenh. — M, cells 37-40^ broad; 0, IT; Cr, cells 



29-32// broad; 1 ; CI, cells 30-32// broad ; W; D, cells 28-30// broad ; 



S.W. of D, cells 34-42// broad, thickness of integuments outside 



cells 12//. 



