EUASTRUM. OO 



E. Yorks ! Near Cockley Beck, Lancashire ! Esher 

 AVest-end Common, Surrey ! 



\VALES. Bethesda, Capel Curig, and Snowdon, 

 Carnarvonshire ! Ffestiniog and Dolgelly, Merioneth ! 



SCOTLAND. Loch Inver, Sutherland ; Poolewe, Ross ; 

 near Alford, Ballater and Aboyne, Aberdeen (Roy fy 

 Bissett). Ben Chiurn, Glas Maol, and Craigan Lochan, 

 Perth ! 



IRELAND. Dungloe, Lough Xacung and Grlentornan, 

 Donegal! Ballynahinch and Derryclare Lough, Galway! 



Geogr. Distribution.- -Austria,. Norway. Sweden. 

 Poland. United States. 



Xofe. Euastrum Lundellii Benn. Freshw. Alg. Engl. Lake 

 Distr. 1886, p. 9, t. 1, f. 13. (Helierella Lundellii Kuntze.) 

 Bennett stated that this plant was the same as E. binale var. 

 elobatum Lund., but his figure certainly disproves this state- 

 ment. We have never seen anything approaching Bennett's 

 figure and doubt very much if his plant could have belonged 

 to the genus Euastrum. 



Var. subelobatum West. (PI. XXXVIII, fig. 36.) 



E. binale subsp. subelobatum West, Alg. W. Ireland, 1892, p. 1-40, t. 20, 

 f. 15 ; West & G. S. West, Alga-fl. Yorks. 1900, p. 6-4. 



Cells somewhat hexagonal ; semicells with truncate- 

 emarginate basal angles and an undulation on each 

 lateral margin between these angles and the apex ; 

 side view of semicell subrhomboid with rounded angles 

 and undulate sides ; vertical view rhomboid-elliptic 

 with rounded angles and undulate sides. 



Length 26 p, ; breadth 18 p, ; breadth of isthmus 5 p. ; 

 thickness 12*5 /*. 



ENGLAND. Oughtershaw Tarn, W. Yorks ! Baugh 

 Fell, Cronklev Fell, and Craydale Moor. X. Yorks ! 



f t. 



IRELAND. Lough Aunierin, Galway ! Lough Gui- 

 tane, Kerry. 



This variety is at once distinguished from var. elobatum by 

 the truncate-emarginate basal angles of the semicells. The 

 side and vertical views also differ in outline. It is a very 

 uncommon variety, but perhaps it has been overlooked. 



