I 





DESCRIPTION OF PLATES. 





Plate VIII, Fig. 1. Portion of an axis of Ipomcea rubrowulea, Hook, covered with 



conidiiferous filaments of Choanephora Simsoni and with a portion 

 of a leaf which served as the source of infection adherent to it . Nat. eias. 



» » » 2 - Conidiiferous filaments of Choancphora Simsoni emerging from the 



surface of an axis of Ipomaa rubro-can ulca 



» » h 3 - Sporangial fructification of Choancphora Simsoni from a culture 



55 i* 



?» 



^ 



51 



*»5 55 





x .5 



in 



infusion of petals of Hibiscus rosa-simnsis 



\ . x :<♦ 



x 4 



„ 4. Zygospores of Choanephora Simsoni at an early --tago of development x 401 

 r> » v 5. Zygospore of Choanephora Simsoni with two twisted processes arising 



at the site of origin of the sporogenic ones x 4(n 



» » » 6. Zygospore of Choanephora Simsoni at an early stage of development, 



showing the very unequal magnitude of the 6porogenic prooeiies 



. which have not yet conjugated 



5 j » „ 7. Zygospore of Choanephora Simsoni, showing one of the conjugating 



processes already completely emptied whilst the other is still 



crowded with ochreous oontents 



» 9 9 „ 8. Zygospore of Choanephora Simsoni, shewing numerous barren processes 



associated with the sporogenic ones • • • • 



„ „ „ 9. Zygospore of Choanephora Simsoni, containing a large globule of oil 



x 400 



X 4<M 



and showing the striate character of the epispore . . . • . # x 400 



J7 „ „ 10. Zygospore of Choanephora Simsoni, showing maximal difference in 



sizes of the conjugating elements ♦ 



„ „ „ 11. Azygospore of Choanephora Simsoni 



x 40. 

 x 400 



„ „ 12. Mycelium of Choanephora Simsoni in the hypodermal tissue of an 



axis of Ipomcea rubro-cceruka, and the lower portion of a conidi- 

 ferous filament emergent through a stomatic orifice x 150 



„ M 13. Portion of mycelium and base of a conidiiferous filament of Choane* 



phora Simsoni 



x 660 



» 55 95 



14. Portion of a mycelial filament in the hypodermal tissue of an axis 



of Ipomcea rubro-ccerulea 



x 830 



„ 15. Ditto ditto . ditto ditto x 830 



lQ m Ditto ditto ditto ditto x 830 



55 55 5> 



» 5? 5* 



17 Ditto ditto ditto ditto x 830 



.18. Portion of a mycelial filament from a culture of Choanephora Simsoni 



in infusion of the petals of Hibiscus rosa-stnensis X 400 



19. Euptured sporangium of C/mnephora Simsoni , showing characters of 



sporangic membrane, columella and spores 



„ 20. Sporangia of Choanephora Simsoni 



x 400 

 x 79 



5> M 59 



21. Chlamydospores developed in a very dilute infusion of the petals of 



Hibiscus rosa-sinensis 



• 



• 



x 400 



» » » 



»» » »» 



22 

 23 



Summit of a conidiiferous filament witn eonidia still adherent ... x 150 

 Summit of a conidiiferous filament, showing form of the capitella . x 150 



Plate IX, Fig. 1. Oonidia of Choanephora Simsoni 



• 



x 830 



. x 830 



" >» » 



>» » » 



•• M >l 



2. Sporangial spores of Choanephora Siuuo* 



3 Germinating eonidia, showing ruptured epispore x 830 



4. Germinating sporangial spores, showing ruptured epispore .... x 830 



Ann. Roy. Bot. Gard. Calc. Yol. VI. 



