PLATE LXXXIV. 



PIGS. 



1-5. Cosmarmm prsemorsum Breb 1 x 473 2 

 x 500; 3, x 600; 4, x 520; 5, immature' 

 zygospore, x 500 . . m 



0. quaternarium Nordst. 2, outline of cell 

 under low magnification; 7, x 570 (after 

 JNordstedt) . . 2Q4 



8-10. C.furcatospermum West & G. S. West x 520* 



[Consult PI LXXXI, figs. 10-11.] ' .' 2 06 



1.- 0. Arnellii Boldt. x 400 (after Boldt) 205 



^. Arnellii forma compressa West, x 625 995 



4 '~ ^- punctulatum Breb. x 500 . 206 



15-20.-C. pnnctulatum var. snbpunctulatum fNbrdst.)' 

 Borges 15, x 840; 16, x 500; 17, x 570 

 (after Nordstedt) ; 18, x 500; 19, x 520- 

 20, zygospore, x 520 . . 2 09 



