] 7 



1889, p. 998; Borgc, Chlor. Norska Finmark. 1892, p. 9; Liitkem. 

 Desm. Attersees, 1898, p. 558 ; Borg. Ferskv. alg. Ostgronl. 1894, p. 

 13; Gutw. Flor. Glon. Okolic Tarnapola, 1894, p. 95; Roy & Biss. 

 Scott. Desm. 1894, p. 44; Liitkem. Desm. Millstiittersees, 1900, p. 8 ; 

 W. & G. S. West, Alga-fl. Yorks. 1900, p. 8S ; Borge, Beitriige Alg. 

 Schweden, 1906, p. 30. 



C. conspersum b. rotundatum forma scandinavica Racib. Nonn. Desm. 

 Polon. 1885, p. 75 ; Gutw. Flor. Glon. Okolic Lwowa, 1891, p. 53. 



Relative length and breadth similar to that of var. 

 liit a in ; lateral margins of semicells subparallel; granules 

 typical, disposed in transverse and vertical series. 



Length 8(5-110^; breadth 66-80^; breadth of 

 isthmus 25-33 //, ; thickness 37-55 /x. 



Skip with Common, E. Yorks! 



AYALES.--Grlyder Fawr, Carnarvonshire (Roy). 

 SCOTLAND. - -Ross, Inverness, Aberdeen, Kincardine, 

 Stirling (Roy $ Bixsett). 



Geofjr. Distribution.- -Germany. Austria and G-alicia. 



Roumania. Xorway. Sweden. Xova Zembla. India. 



i/ 



This variety as we know it is in no way inferior in size to 

 typical C. conspersum, but other observers have recorded much 

 smaller forms. Raqiborski records both a " forma inter - 

 inetlitt ' (length 70-72^; breadth 55-61 /j) and a "forma 

 minor' (length 54-55 /u ; breadth 43/1) from Poland; and 

 Boldfc describes and figures a rather small form from Green- 

 land in which the semicells possess upwardly diverging sides 

 (length 72-82 ju ; breadth 52'2-64'8 /u). It may be, however, 

 that these forms would be better referred to the var. latum. 



Var. subrotundatum West. (PL XCIX, fig. 4.) 



C. conspersum Ralfs var. subrotundatum West, Alg*. W. Ireland, 1892, p. 

 152, t. 21, f. 7. 



Superior angles of semicells greatly rounded ; 

 granules rather more numerous, disposed in about 12 

 horizontal and 21 vertical series. 



Length 84 p, ; breadth 82 //, ; breadth of isthmus 30 ^ ; 

 thickness 42 p.. 



IRELAND.- -Cromagloun, Kerry ! 



It might be mentioned here that the most dilated and 

 rounded of all the Gosmaria of this type is a North American 

 species with greatly inflated semicells, which has been des- 

 cribed as Cosmarium Johnsonii W. & Gr. S. West ( c Some 

 Desm.U. S/ 1898, p. 306, t. 17, f. 4). 



VOL. IV. 2 



