PLATE XXXYI. 



FIGS. PAGT5 



1. Euastrum sinuosum Lenorm. x 480 . 20 



2-3. E. sinuosum var. reductum West & G. S. West. 



2, x 430; 3, x 520 . . 22 



4. E. Jenneri Arch, x 400 (after Ralfs) . 22 



5-6. E. aboense Elfv. 5, x 520; 6, vertical view, 



x 500 (after Elfving) . . .23 



7-8. E. inerme (Ralfs) Lund, x 430 . 24 



9. E. cuneatum Jemier. x 520 . . 25 



10-13. .E/. ansatum Ralfs. 10 and 12, x 430; 11, 



x 520; 13, zygospore, x 430 . 27 



14-15. E. ansatum var. pyxidatum Delp. 14, x 416 



(after Delponte) ; 15, x 520 . .29 



16-17. E. obesum Josh. 16, x 300 (after Joshua) ; 



17, x 520 . . .29 



