COSMARIUM. 109 



as broad, with a slight median constriction ; semicells 

 subrectangular, upper and lower angles rounded, apex 

 rounded-truncate or subtruncate. Vertical view cir- 

 cular. Cell-wall finely punctate- scrobiculate, with the 

 punctulations disposed in close transverse series. 

 Chloroplasts axile, one in each semicell, with a central 

 pyrenoid and a number of longitudinal ridges. 



Zygospore unknown. 



Length 32-48 p.; breadth 14-1 7 /x; breadth of 

 isthmus 1 ol 5 'o p.. 



ENGLAND.- -Cocket Moss, near Giggleswick, Cowside 

 Beck, Arncliffe, and Old Cote Moor, W. Yorks ! Sub- 

 fossil in peat deposit at Filey, E. Yorks ! 



\YALES.--Capel Curig ! and Pen-y-gwryd (Roy), 

 Carnarvonshire. 



SCOTLAND.- -Poolewe, Ross; near Brin, Inverness; 

 Glen Callater, Aberdeen; Canlochan, Forfar; Rannoch, 

 Perth; Alva Glen, Stirling (Roy $ Blsseit). 



IK ELAND.- -Lower Lake of Killarney and Glen 

 Caragh. Kerry ! 



O tJ 



Geogr. Distribution.- -France. Germany. Austria 

 and Galicia. Hungary. Italy. Xorway. Sweden. 

 Finland. N. Russia. Azores. Sandwich Islands. United 

 States. Guiana. Brazil. 



This species is closely allied to C. CucuMta, but differs in 

 its relatively greater length, and in the transversely arranged 

 and more crowded punctulations of the cell-wall. 



118. Cosmarium subpalangula Elfv. 

 (PL LXXIV, fig. 7.) 



Cosmarium subpalangula Elfv. Anteck. Finska Desm. 1881, p. 14, t. 1, 

 f. 11 ; Eoy & Biss. Scott. Desrn. 1894, p. 175 ; Nordst. Index Desm. 1896, 

 p. 246. 



Dysphinctium subpalangula (Elfv.), De Toni, Syll. Alg. 1889, p. 882. 



Cells small, about 1-J- times as long as broad, 

 doliform, very slightly constricted; semicells ovate- 

 truncate, sides convex and convergent upwards, apex 

 broadly truncate. Vertical view circular. Cell- wall 

 indistinctly granulate, granules in about 4 transverse 



