HiiJ.37, Hiutau of I'latu Indusliy.U S.Deptol' A^iiciiUure 



P1^\TK 1. 





•i 



J ,- 



M 



V • 



I » 



t 



ms. <&^. 



.i JS HlfcN A CO N.> 



FORMATION OFTHESPORES IN RHIZOPUS NIGRICANS AND PHYCOMYCES NITENS 



