PLATE CIIL 



PIGS. PA',K 



1. Cosmarium basil i<:n in G. S. West. x 520 . 44 

 2. C. prominulum Racib. x about 1200 (after 



Raciborski) . . . .4(5 



3. G. prominulum var. subandtdatum W. c\r G. S. 



West, x 520 . . .47 



4. C'. Portianum Arch. JZygospore, x 390 (after 



De Bary) . [Consult' Vol. Ill, page 166] . 

 5-6. C'. Grayanum De Toni. 5, x 400; 6, zygo- 



spore, x 200 (after Gay) . . 7 



7. C. Pseudobroomei Wolle. Zygospore, x 400 



(after Ralfs) . . . .22 



8. C. Botrytis Menegh. var. emarginatum Hansg. 



x 400 (after Hanssrircr) . . 6 



\ . o o / 



9. C. amcenum Breb. x 500. [Consult PI. CII, 



figs. 1-4] . . 29 



10. C. Wittrockii Lund. x 520. [Consult PI. 



LXXVIII, fig. 19, and page 179 in Vol. Ill] . 



11-13. C. tu t f icliomlrv.ni Lund. 11, x 400 (after 



Lundell) ; 12 and 13, x 520 . . 45 



14. Xmithidium subhastiferum West var. Murray i 

 W. e\: G. 8 West. A form in which one 

 semicell is furnished with a pair of accessory 

 spines, x 430 . . . .57 



