214 THE ORGANISMS IN YEAST. 



Fig. 5. — Antlieridium penetrating oogonium and commencing forma- 

 tion of gonosphere {g). 



6. — Fecundation of gonosphere by antlieridium. 

 7. — Formation of oospore. 



8. — Antlieridium, the fecundating tube of which has been isolated 

 by artificial evacuation of the oogonium. 



9. — Young oospore covered by the reticulated epispore. 



10. — Ripe oospore, with thick epispore. 



11. — Oospore, with epispore detached, and with remains of 



3) 



3) 

 3J 



3 3 

 33 

 33 



fecundating tube. 



^be ©roanieme in ll)ca9t 



By Henry C. A. Vine. 



A Paper read to the Members of the Bath Microscopical Society, 



May, 1884. 



Plate 25. 



THE amount of material at disposal renders it somewhat 

 difficult to deal with the subject of organised ferments, even 

 within the limits indicated by my title, in a manner at once 

 succinct and comprehensive, and careful consideration has been 

 necessary as to the best manner in which it could be placed before 

 our readers. The chief points of past research, the outlines of 

 the methods which have been, and most conveniently may be, 

 employed in such investigations, and finally the nature and classi- 

 fication of the organisms themselves, all in turn demand, and 

 must receive, a share of attention. 



The announcement of the discovery of the " yeast plant " — as it 

 was called, by Schwann and Cagniard-Latour some fifty years since 

 — caused considerable attention to be directed to the study of 

 ferment life ; but the theories of the nature of the fermentative 

 and putrefactive changes, elaborated by the illustrious Liebig, led 

 to the idea that the organised structures observed in fermenting 

 liquids were the concomitants rather than the actual agents of the 



