Clare Inland Survey — Fresh-water Algae. 16 15 



Euastrum insulare Wittr.— W, 17-5 x 11-5/*; M, LG; SW of D, 29 x 1 9/j, in 

 one place a short wide form occurred 16 x 14/*. 



var. PARVUM, var. nov. — Var. cellulis similibus ad formam 

 typicam sed parvioribus et relative brevioribus, lobulis lateralibus 

 minus retusis, 12-5 x 10/*. D ; Or, 14-17 x 12-13/*. 

 montanum W. & G. S. West. — C ; LG, in this locality the examples had 

 more pyramidal semicells than in the type, causing the apices to he 

 relatively narrower; D, 27"5 x 20'5/*, width of apex 12'5/*. 

 oblongum (Grev.) Ralfs. -C, IT, W; M, 174 x 89/*; Or, 166x83/*; D. 

 (Plate I, fig. 1.) 



var. cephalophorum West. — Or, 158 x 93/*. 

 pectinatum Breb. — 0, W, M, VL, IT, LG, D. 



var. inevolutum W. & G. S. West. — C. 

 pulchellum Breb.— C, 38 x 33-36/*; M, 37 x 28/*. 



var. retusum W. & G. S. West. — 0. 

 rostratum Ralfs. — ; L, 52 x 30/* ; W. 

 sublobatum Breb. — IT. 

 Turnerii West.-SL; Or, 36-37-5 x 28-3/*. 

 *validum W. & G. S. West.— M, 26-6 x 23. 

 ventricosum Lund. — M, W. 

 verrucosum Ehrenb. — W, D. 



var. reductum Nordst. — K; LG. 

 Micrasterias apiculata (Ehrenb.) Menegh., var. fimbriata (Ralfs) Nordst. — 

 C, W. 

 Crux-melitensis Ralfs. — W ; Or, 106 X 93/*, width of polar lobe 24 - 5/*. 

 denticulata Breb.— C, 224x194/*, 222x192/*, 220 X 196/*; W ; OP, 

 the following are measurements of some of the specimens in /* : — 

 232 x 224, 238 x 212, 220 X 189, 224 x 224 (an example as broad as 

 long), 220 x 200, 216 x 182, 240 x 196, 228 x 208, 208 x 186. (PI. 1, 

 fig. 14, various forms of polar lobes; Plate II, figs. 17, 18). 



var. angulosa (Hantzsch) W. & G. S. West. — O, 275 x 215/*. 

 Jenneri Ralfs.— W; D, 171 X 123/*. 



var. simplex West. — D, 170 x 117/*. 

 oscitans Ralfs, var. mucronata (Dixon) Wille. — W ; D, 171 X 123/*, rare, 

 pinnatifida (Kiitz.) Ralfs. — W. 

 papillifera Breb. — SL, W. 

 rotata (Grev.) Ralfs.— W. 

 Sol (Ehrenb.) Kiitz. (M. radiosa Ralfs).— W. 

 thomasiana Arch.— AS ; D, 226-230 x 175-160/*. 



truncata (Corda) Breb— C, 106x103/*, 114x106/*; M, I, W; CP, 

 132x110/* and 145x121/*; D. 



