362 



BOTANY 



Fi<;. L'iKi. \\i\K-li' fit- >r,s.v(/ ('.-. .1. Yolinj: sporangium, /.'. /onsporc with the s|>oran.uium from wliieh 

 it lias escaped. ('. A pint ion of the peripheral /one of a zoos|x>re. />. a voiin^ plant with 

 rhizoids develo]ied from a xoos|Kire. (X. /'. after COT/.: /'. after S.\< us : from OLTMANNS' 

 Aline. I', after STI:ASHCKCKK.) 



oogoniuni contains nuineroiis nuclei, 

 of which all hut one, the nucleus of 

 the future egg-cell, retreat again into 

 the main filament before the format ion 

 of the septum. In l'.<ji',,t inafd. 1>.\\ is 

 foun<l that all the nuclei, except that 

 of the oosphere, that arc in the 

 oogoninm degenerated and disap- 

 peared. In its mature condition the 

 oogoniuni lias on one side a lieak-likc 

 projection containing only colourless 

 protoplasm. The oogoniuni opens at 

 this place, the oosphere rounding it- 

 self off. The antheridia, which are also 

 multinuclear, are more or less coiled 



(a), and open at the tip to set free their mucilaginous contents, which luvak up into 





Fie:. li'.'T. I'liin-li'-i-iii .wxsi'/i.v. 1'ortion of a lilaineii 

 with an oogoniuni, o ; antheruliiini, <i ; <-h, chro 

 iiiato]ili<>res : ii. cell nuclei; ut, nil plol'iiles. 

 (X 240.) 



