Some Questions zvhich they Suggest. 57 



jelly of the interior passing through the strands of the 

 network and forming a very thin external coat. The next 

 step is taken when the strands of this network thicken so 

 as to occupy nearly the whole surface of the projection 

 and then break up into polygonal plates, each furnished 

 with a nucleus ; from each of these plates there grows a 

 pedicel supporting a ball which is the future spore ; into 

 this the opaque plasma of the plate passes. This state 

 of things is shown in Fig. 17. When the spores have 

 fallen off, the rest of the plant withers and disappears. 



Each swarm spore, according to these authors, often 

 shows amoeboid move- 

 ments; divides into two V'" ~ ,'U 

 equal parts, which assume 



a cross-like posture in \>' 



their greatest length, the ^ ,;--. j _ ^...^ 



one lying on the other ; $A i 

 then each of the two parts T, ' ' ; : \\ 



divides into two other 



parts and again each Of _ Fl - W. Ceratomyza mucida. 

 Development of Spores x 160. 

 the four divides into two (After Famintzin and Woronin.) 



parts, so that the original 



swarm spore is now represented by eight protoplasts all 

 lying together ; these then separate, develop cilia, and 

 act as free swarm spores. Fig. 18 represents the eight 

 protoplasts lying crosswise together, before their final 

 separation. We are bound to add that this peculiar 

 process has not been noticed by Mr. and Miss Lister in 

 their numerous observations on Ceratomyxa, nor by our- 



