COSMAEIUM. 9 



p. 149 ; Hansg. Prodi-. Algenfl. Bohm. 1888, p. 196 ; De Toni, Syll 



Algar. 1889, p. 946 ; West, Alg. W. Ireland, 1892, p. 147 ; Alg. Engl. 



Lake Distr. 1892, p. 726 -, Liitkem. Desm. Attersees, 1893, p. 550 ; Roy 



& Biss. Scott. Desm. 1894, p. 177 ; Nordst. Index Desmid. 1896, p. 268 ; 



West & G. S. West, Alg. S. England, 1897, p. 487 ; Liitkem. Desm. 



Millstattersees, 1900, p. 12 ; West & G. S. West, Alga-fl. Yorks. 1900, 



p. 82 ; Alg. X. Ireland, 1902, p. 35 ; Freslnv. Alg. Orkneys and Shet- 



lands, 1905, p. 21. 

 ? Didiii'iii.di.Kni (Cosmarium] Braunii Eeinsch, Algenfl. Frank. 1867, T). 114, 



t, .10, f . 3 [in part ; b and e ?] 

 Cosmarium Cambricum Cooke & Wills in Grevillea, 1880, p. 91 ; Cooke, 



Some Desm. New to Britain, 1881, t. 13, f . A b ; Lagerh. Bidr. Amerik. 



Desm.-fl. 1885, p. 241 ; Cooke, Brit. Desm. 1887, p. 98, t. 42, f. 16 ; De 



Toni, Syll. Algar. 1889, p. 957. 



C. Caiitl't-u'nm a. ttipicv.m Eacib. Xonn. Desm. Polon. 1885, p. 79. 

 Ursinella venusta Knntze, Eev. gen. plant. 1891, p. 926. 

 U. Cambrica Knntze, 1. c. p. 924. 



Cells rather small, about 1J times longer than broad, 

 very deeply constricted, sinus narrowly linear with a 

 dilated apex ; semicells truncate-pyramidate, sides (in- 

 cluding the rounded upper and lower angles) triun- 

 dulate, apex widely truncate and generally slightly 

 retuse (more rarely straight). Side view of semicell 

 elliptic. A r ertical view elliptic, ratio of axes about 

 1:1-8. Cell-wall minutely punctate. Chloroplasts 

 axile with one central pyrenoid. 



Zygospore unknown. 



Length 32'6-42 M ; breadth 22-32*5 /u ; breadth of 

 isthmus 5'7-13'4jii; thickness 12-19 ,. 



ENGLAND.- -Cumberland ! Westmoreland ! (Bissett). 

 Lancashire ! \V. X. and E. Yorks ! Hants ! Devon ! 

 Cornwall ! 



WALES. Capel Curig! (Cooke $ Wills),'Moel Siabod!, 

 Yr Orsedd!, and Y Foel Eras!, Carnarvonshire. 



SCOTLAND. General ! (Roy fy Bissett). Outer He- 

 brides ! Orkneys ! Shetlands ! 



IEELAND. Donegal ! Mayo ! Galway ! Kerry ! 

 Dublin and AYicklow (Archer). 



Geogr. Distrilutiun. France. Germany. Austria, 

 Galicia. Norway. Sweden. Denmark. Finland. 

 Poland. Russian Lapland. S. Russia, Faeroes. 

 Nova Zembla. Greenland. Siberia. India, Sumatra 

 (form). Java, Australia. Azores. United States. 



Paraoruav. 



<> t/ 



