122] 



'I'hc Classification of Lower Organisms 



Fig. 24. — Zygomycetes: a-d, Rhizopus nigricans; a, sporangia x 50; b-d, prega- 

 mctes, suspensors and gametes, and zygote x 200. e. Zygote of Phycomyccs nitens 

 after Blakeslcc ( 1904). f, g, Conidiophore with young conidia, and mature conidia, 

 of Syncephalis pycnosperma after Thaxtcr (1897). h, i, Conjugation of Synce- 

 phalis nodosa after Thaxter, op. cit. j, Sporangium of Synccphalastrum raccmosum 

 after Thaxter, op. cit. k, Sporangium of Flaplospoiangium lignicola after Martin 

 (1937), x 1,000. 



