COSMAKLUM. 180 



land ! Inverness ! Orkneys ! Shetlands ! Some- 

 times in the plankton ! 



IRELAND.- -Donegal ! Mayo! Gal way ! Down! 

 Loutli ! Tyrone ! 



Gt'oijr. Distribution.- -France. Galicia in Austria. 

 Bosnia. Sweden. Sandwich Is. New Zealand. 

 United States. Brazil. Paraguay. Argentina. 



In the British Islands this variety is almost as generally 

 distributed as the type. 



Some small forms were observed from Cambridgeshire 

 intermediate in character between C. granatum var. subgrana- 

 t inn and C. granatoides Schmidle (' Chlorophy.-FL Torfstiche 

 Virnheim/ 1894, p. 52, t. 7, f. 12; C. Meneghinii var. grana- 

 toides Schmidle, ' Beitr. Algenfl. Schwarzwald. u. Rheineb./ 

 1893, p. 28, t, 6, f. 15). Consult G. S. West, < Alga-fl. Cambr./ 

 1899, p. 115. It is most probable that " C. granatoides' is 

 only one of the numerous varieties of C. granatum. 



Var. elongatum Norclst. (PI. LXIII, fig. 10.) 



C. granotum Breb. var. elongatum Norclst. Desm. Spetsb. 1872, p. 29, t. 6, 

 f . 6 ; Desm. Ital. 1876, p. 32 ; Schaarschm. Afghan. Alg. 1884, p. 247 ; 

 Boldt, Desmid. Gronland, 1888, p. 12 ; Eoy & "Biss. Scott. Desm. 1894, 

 p. 102. 



Cells twice as long as broad, less deeply constricted ; 

 semicells somewhat elongated on the basal part. 



Length 48-59 //, ; breadth 25'2-29 p, ; breadth of 

 isthmus 14 /x. 



SCOTLAND. Xear Abovne, at Homehead in Looie- 



t.' O 



Coldstone, and in Ballochbuie near Balmoral, Aber- 

 deen; Muchalls, Kincardine; Reeky Linn, Forfar 

 (Rot/ cjj 1 Bissett). 



Geoc/r. Distribution. Spitzbergen. Greenland. 

 Afghanistan. 



Schaarschmidt mentions the occurrence of zygospores of 

 this variety in Afghanistan, but he neither describes nor 

 figures them. 



Var. Grunowii Roy & Biss. (PI. LXIII, fig. 9.) 



C. granatum Breb. var. Grim. Diat. u. Desm. Ins. Bank. 1865, p. 15, t. 2 



.27. 

 C. granatum Breb. var. Grunoini Eoy & Biss. Scott. Desm. 1894, p. 102. 



