PLATE LXXX. 



FIGS. PAGE 



12. Gosmarium Logiense Biss. I, x 400 (after 



Roy & Bissett) ; 2, x 500 . .163 



3. C. granulatum West. x 400 . .164 



4-7. C. Portianum Arch. 4 and 5, typical Irish 

 examples, x 500, showing the general dis- 

 position of the granules in vertical series . 165 



Figs. 6 and 7 are after Schmidle's figures 

 of "var. orthostichum Schnridle" ; 6, x rather 

 less than 600 ; 7, x 600-700 (Schmidle says 

 between 700 and 800, but this is incorrect if 

 compared with his stated dimensions). We 

 see no reason for regarding the " var. ortho- 

 stichum ' as anything different from the 

 typical plant. Schmidle's two figures differ 

 more from each other than either differs from 

 the common Irish form of C. Portianum first 

 observed by Archer. 



8. Zygospore stated by Wolle to belong to 

 C. Portianum, but undoubtedly that of some 

 other Cosmarium. x 500 (after Wolle). 

 9. Zygospore of " C. Pseudomargaritiferum 

 Rein sch/' a species which Archer has stated 

 to be synonymous with his C. Portianum. 

 x 720 (after Reinsch). It is probably an 

 immature zygospore which has not yet deve- 

 loped the conical warts. 

 10-11.- C. Portianum var. nephroideum Wittr. 10, 



x 500; 11, x 600 (after Roy & Bissett) . 167 

 12-19. C. orthostichum Lund. 17, side view, x 400 



(after Lundell) ; 12-16, 18 and 19, x 520 . 167 

 20-21. C. orthostichum var. pumilum Lund. 20, x 400 



(after Lundell) ; 21, x 520 . . 169 



22. C. orthostichum var. compactum W. & G-. S. 



West, x 500. . . .169 



23. C. solidum Nordst. x 570 (after Nordstedt) . 170 



