48 



BOTANY. 



Fig. 3Q.Peronospora alstnenrum. A , yonng oosconinm o, and young antheridium 

 n, in contact with it ; B, the antheridium u beginning to pierce the oogonium o, whose 

 protoplasm is becoming condensed ; C", the fine tube of the antheridium n has pen- 

 etrated the oogonium o, and come in contact with its condensed and rounded proto- 

 plasm, the oof-ptere. X 350. After De Bury. 



Fia. 40. 



Fig. 40. Female reproductive organs of a moss, Funaria hygrometrica. A, apex 

 of tfie stem ; a, archegonia ; b, leavi s : B, archegonium ; o, base : h, neck ; TO, 

 mouth : C, month of fertilized archegonium A x 100, B X 550. After Sachs. 



Fig. 41. Male reproductive organs of tht> same moss. A^ antheridium open and 

 permitting the ppermatozoids a to escape ; //. It. spe; ni-cell of another moss (Polytri- 

 chum), with contained ppermatozoid ; c, .-pormatozoid free, with two cilia at the 

 pointed extiemity. A X 850, B X 800. After Sucha. 



