cosMARimr. 149 



WALES.- -Bethesda!, Glyder Fawr and Pen-y-gwryd 

 (Roy), Capel Curig ! (Coolie $' Wills), Carnarvonshire. 

 Dolgelly, Merioneth (Rnlfs). Llyn Coron, Anglesey! 



SCOTLAND.- -Ross, Inverness !, Banff, Aberdeen, Kin- 

 cardine, Forfar, Perth!, Argyll (Roy $ Bissett). 



IRELAND.- -Mayo ! Galway ! Kerry ! Dublin and 

 Wicklo w (A i 'die i ) . 



Geogr. Distribution. France. Germany. Austria 

 and Galicia. Bohemia. Hungary. Italy. Norway. 

 Sweden. Denmark. Bornholm. Finland (var.). 

 Lapland. S. Russia. Greenland. Spitsbergen. Afghan- 

 istan. Sumatra (var.). Abyssinia. New Zealand. 

 United States. 



This species is widely distributed but by no means common. 

 We figure a small form of it (PL LIX, fig. 4) which might 

 almost stand as " forma minor " length 34 /LI ; breadth 27*5 fj. ; 

 breadth of isthmus 11 /u. Gutwinski has described a "forma 

 minima' from Galicia with the following dimensions: 

 length 17-22 /u ; breadth 16-17 ju : breadth of isthmus 5 /u. 



Var. minutum Wittr. (PL LIX, figs. 6, 7.) 



C. undulatum Corda var. minutum Wittr. Skandiiiav. Desm. 1869, p. 11, 



t. i, f. 3 : Gotl. Ol. sotv. Alg. 1872, p. 59 ; De Toni, Syll. Alg. 1889, 



p. 973 ; Eoy & Biss. Scott. Desm. 1894, p. 177. 

 C. crenatnm Ealfs var. alpinum Eacib. Nonn. Desm. Polon. 1885, p. 76, 



t. 11, f. H. 

 C. alpinum (Eacib.) De Toni, Syll. Alg. 1889, p. 942 ; Schmidle in Hed- 



wigia, 1894, p. 89. 

 U'rsinella alpina Ktmtze, Eevis. gen. plant. 1891, p. 924. 



Cells smaller, about 1 times longer than broad; 

 semicells subsemicircular, basal angles rounded, margin 

 undulate, with 12-14 undulations. 



Length 21-28 p.; breadth 18-21 p.; l)readth of isth- 

 mus 8'5-lG p.; thickness 12-13 p.. 



ENGLAND. Strensall Common, X. Yorks ! (Turner). 

 Leicestershire (Roy). 



SCOTLAND. " Xot so common as the type ' (Roy fy 

 Bissett). 



IEELAXD.- -Foxford, Maj^o ! lar Connaught, Galway ! 



Geogr. Distribution. Germany. Sweden. Poland. 



