PLATE LXXXII. 



FIGS. > 1 



1. Cosmarium trachydermum West & Gr. S. West. 



x 520 . . . 178 



2-4. C. sphseroideum West. 2, x 400 ; 3 and 4, 



x 500 . . . . 178 



5-7. C. synMibomenum West. 5 and 6,, x 625 ; 7, 



x 1000 ... 180 



8. C. protractum (Nag.) De Bary. x 500. [Con- 

 sult PI. XCIV, figs. 4-5.] . . 181 

 9_H._C. Corbula Breb. 9, x 520; 10, x 600; 11, 

 zygospore, x 400. 10 and 11, after Roy & 

 Bissett .... 183 

 12-13. C. Sportella Breb. 12, x 520; 13, x 500 185 

 14. C. Sportella var. subnudum West & Gr. S. West. 



x 520 . . . . 186 



15. Zygospore of C. reniforme (Ralfs) Arch, x 500 157 



16-17. C. Turpinii Breb. 16, x 500; 17, x 400 . 189 



