Clare Island Survey — Fresh-water Algae. 16 19 



Cosmarium quadratum Kalfs.— W, D; Cr, 575 x 33'5/*, also 60 x 31/*. 

 quadrifarium Lund.— W, 51-55 x 48-50/*. 



quadrum Lund.— Cr, 72 x 70/*, 66 x 66/*, 63 x 68 (broad)/*, 78 x 60/*. 

 *Quassilus Lund. — W. 

 quinarium Lund. — Cr, 37"5 x 31/*. 

 Ralfsii Breb.— W, SL. 



var. ROTUNDATUM var. nov.— Var. lateribus semicellularum 



rotundatis, angulis basalibus interdum levissime productis. 



sinu subclauso, 110x100/*, isthmus 24//.. W. (PI. II, fig. 19.) 



var. montanum Racib. — D, 126 x 98-5/*, a form with the sinus 



open to its apex. D. (PI. II, fig. 20.) 



rectangulare Grun. — C, common among Utricularia minor, 31-36'5 x 



26-30/* ; IT, LG, I, CP, D. 

 radiosum Wolle. — W. 

 Regnellii Wille. — C, 4*6/* long, 13-4/* wide : from another place 



17 x 14-5/t, 18 x 14-7/*, 15-5 x 13/* ; L, CI, B, DL, D. 

 Regnesi Eeinsch.— I, W ; C, 8 x 8/* ; D, 82 x 8-2/*. 



var. tritum West. — W. 

 reniforme (Ralfs) Arch. — C, 48 x 44/*, isthmus 13-5/*; L, LG, W; Cr, 



50x48/*; M; K, 52-5 x 47'5/*. 

 *sexangulare Lund. f. minima Nordst. — C, CI, IT. 

 speciosum Lund. — C. 



var. biforme Nordst. — D. 

 sphagnicolum W. & G. S. West. — C, 9/* long, 11/* wide ; DL, Cr ; 



D, 10/* long, 12'5/a wide. 

 sphalerostichum Nordst.— C, M, W, D, B, W, SL. 

 subcostatum Nordst. - C, 25 x 23/*, the smaller forms approaching f. minor. 



f. minor W. & G. S. West.— K, 24 x 224/*. 

 subcrenatum Hantsch. — C, from several places, the small forms 26 x 22/i, 

 the largest examples measured 33 - 5 x 30/* ; D, 25 - 5 x 22/x. 

 var. divaricatum Wille. — W. 

 *subcucumis Schmidle. — CI; B, 70 x 45/*. 

 subspeciosum Nordst. — W. 

 subundulatum Wille. — W. 

 subtumidum Nordst.— C, L, LG, W, D. 



var. MINOR var. nov. — Var. cellulis minoribus quam in forma 

 typica, 26 x 20/*. C. 

 subprotumidum Nordst. — C. 



var. Gregorii (Roy and Bissett) W. & G. S. West. — Plankton 

 of RL ; L, CI, W, SL ; plankton of LG, 31 x 29/*. 

 C2 



