THE BEGINNINGS OF LIFE. 



183 



• -'Pores 

 Host. ' ' 



lot 



exceed! 



\ 



iuctive 



spores 



gst Fungi, to 



s said by Erai3 



^ay Society, i8;j^ 



Tiie two pkiife 



, the didiotomous 



into sections Iv 



i 



n for closed cells, 

 terminal sections 



>me spore cases' 

 f icW^'abybelBj 

 /c), moreover, tlie 

 when discharged, 

 ;e's 'Microscopic 

 esence or absence 

 linute dilTerence; 

 give aBY P«''= 

 ■tween the rep 

 ■ these and 0* 

 ioned that I to^'J 

 , of the fila^:"' 

 slow osciU* 

 IS quite .ot>« 



•n of *^ ^ 



I 



p 



I 



I 



t 



I 



\ 



the somewhat anomalous species of which we have just 



w 



been speaking. A similar mode of origin of spores 

 is^ in fact, very common even in highly organized 

 Fungi, and also in very many Lichens. Thus it pre- 

 vails universally throughout the family of ascomycetous 



Fig. 8. 

 Development of Spores in one of the Ascomycetous Fungi 



{Perisporhim vulgare), (Corda.) 



a, 6, c. Commencing differentiation of homogeneous matter within asci. 

 d, e,/. Apparent resolution of this into distinct rounded spores. 

 g. Rupture of ascus. and exit not of separate spores, but of sets of four, 

 each contained within a delicate theca. 



Fungi 1, and also amongst all the ascigerous Lichens : 



^ The Rev. M. J. Berkeley, our leading cryptogamic botanist, says : 

 ' There is another point of immense importance, which the cryptogamic 

 observer has in a peculiar degree the power of studying successfully. 

 Questions often arise as to the point whether cellular structure can 



