Clare Island Survey — Fresh-water Algae. 16 5 



C. polyacantha Braun. — Castlebar. 



C. vulgaris L. — Mulranny ; Achill. 



Nitella translucens Ag. — Newport; Clare I. 



N. opaca Ag. — Newport ; Castlebar ; Achill ; Clare I. 



Class CHLOROPHYCEAE. 

 Order OEDOGONIALES. 

 Fam. Oedogoniaceae. 

 *Bulbochaete Brebissonii Kiitz. — I. 

 gigantea Pringsh. — W. 

 insignis Pringsh. — LC 

 mirabilis Wittr. — C. 

 Oedogonium Braunii Kiitz. — C. 



crispum (Hass.) Wittr. — C, vegetative cells 10-loju broad, 4 to 6 times 



longer, oogonia (average) 40^ wide, 36/a high, 

 cryptoporum Wittr. — C, veg. cells 44 x 7^7'5/u, oogonia 27// broad 

 21/i long. 



var. vulgare Wittr. — C. 

 *giganteum Kiitz. — L. 

 Itzigsohnii De Bary, var. minus West. — D. lat. cell 58-7ju, lat. 



oogonia 25 - 26,u. 

 macrandrum Wittr. — VL. 

 platygynum Wittr. — C. 

 **pusillum Kirchn. — C, vegetative cells 3 - 3 x 12/* (average), oogonia 12/i 



broad, 14/u long. 

 **propinquum Wittr. — VL. 

 punctato-striatum De Bary. — LG. 

 Rothii (Le CI.) Pringsh.— VL, D. 

 undulatum (Breb.). — A, Br, C, I. 

 *urbicum Wittr. — B. 

 Several other sterile species from many localities. 



Order CHAETOPHOEALES. 

 Fam. Herposteiraceae. 

 Herposteiron confervicola Nag. — C, K. 



Fam. Ulotrichaceae. 

 *Ulothrix aequalis Kiitz. — L; W, up to 18-20/« broad, 26-30/t long ; C, B. 

 var. catenaeformis (Kiitz.) Babenh. — IT. 



