20 BRITISH 



W. and N. Yorks ! Lancashire ! Surrey ! Sussex 

 (Rolfs). Kent (Ralfs). Hants! (Rolfs}. Devon! 

 (Bennett). Wilts! Cornwall! 



WALES. General through Carnarvonsliire (Glycler 

 Fach at 2,200 ft.) ! Dolgelly, Merioneth (Ralfs). 



SCOTLAND. Sutherland ! , Ross ! , Inverness ! , Aber- 

 deen ! , Kincardine ! , Forfar ! , Perth ! , Argyle, Arran, 

 Fife ; zygospores near Cambus-o'-May, Aberdeen (Roy 

 Sf Bissett). Skye (with zygospores) ! Common in Outer 

 Hebrides ! Orkneys ! 



f,' 



IRELAND. Donegal ! Gal way ! Mayo ! Kerry ! 

 Dublin and Wicklow (Archer). Down ! Antrim ! 



Geogr. Distribution. France. Germany. Hungary. 

 Italy. Norway. Sweden. S. Russia. Faeroes. 

 India (var.). United States. 



This species is generally distributed throughout the 

 Sphagnum-bogs of the British Islands. The general outline 

 in front view and the form of the polar lobe, particularly in 

 the vertical view, are absolutely characteristic. We have 



' V 



examined many thousands of British specimens, and find the 

 three scrobiculations in the centre of the semi-cells very con- 

 stant, this being the reason we have included Kordstedt's 

 "forma scrobiculata ' with the type form. Ealfs did not 

 accurately indicate the surface protuberances,, and he remarks 

 in his text that thev were " indistinct/ 



9. Euastrum sinuosum Lenorm. 

 (PI. XXXVI, fig. 1.) 



Euastrum sinuosum "Lenormand, in herb." Ralfs, Brit. Desni. 1848,. 



p. 85 ; Lund. Desni. Suec. 1871, p. 20; Nordst. Alg. aq. dulc. et Char. 



Sandvic. 1878, p. 14; Cooke, Brit. Desni. 1886, p. 71, t. 34, f. 3 ; Nordst. 



Freshw. Alg. N. Zeal. 1888, p. 33 ; De Toni, Syll. Alg. 1889, p. 1098 ; 



Borg. Desni. Brasil. 1890, p. 33, t, 3, f. 16 ; West, Alg. W. Ireland, 



1892, p. 138 ; Alg. Eng. Lake Distr. 1892, p. 723 ; Roy & Biss. Scott. 



Desni. 1894, p. 178; Nordst. Index Desm. 1896, p. 235"; West & GK S. 



West, Alg. S. England, 1897, p. 483 ; Alga-fl. Yorks. 1900, p. 61 ; Freshw. 



Chlorophy. Koh Chang, 1901, p. 168; Alg. N. Ireland, 1902, p. 28; 



Freshw. Alg. Ceylon, 1902, p. 148. 

 Euastrum circulate Hass. var. /3 Kalfs, Brit. Desm. 1848, p. 85, t. 13, f . 5 a,. 



b, and d. 

 E. circulare C. Falesiensis Breb. Liste Desm. 1856, p. 122 (Ralfs, Brit. 



Desm. t. 14, f . 3 b and c). 



E. circulare /3 sinuosum Hansg. Prodr. Algenfl. Bohm. 1888, p. 206. 

 Helierella sinuosa Kiintze, Revis. gen. plant. 1891, p. 899. 



