PLATE XCV. 



FIGS. PAGE 



1-3. Cosmarium Scoticum West & G-. S. West. 1 



and 3, x 400 ; 2, x 250 . . 269 



4-7. G. tetraophthalmum Breb. 4, x 400 ; 5 and 6 ; 



x 500; 1, zygospore, x 200 (after Ealfs) . 270 



8-9. G. tenue Arch. Zygospores, x 520 . p. 167, vol. ii 



