430 M. C. A.J. A. Oudemans on Endogenous 



tative part, or the mycelium, and the latter the generative 

 part. Both were generally beset with extremely fine raphides 

 of some calcareous salt (not carbonate of lime). In the creep- 

 ing threads I found dissepiments, but not in the erect ones. 

 Now, however, it appeared that the latter, charged with the 

 spore-formation, bore these spores not at their tips, or in 

 lateral branches, and did not produce them by separate con- 

 strictions or in chains, but really developed them in their in- 

 terior. At regular distances (fig. 2) colourless denser parts 



a 



Fig. 1. — Vl&xii oi Sporendonevm terrestre, Oud., eularged (diagra 

 Fig. 2 a. — Part of an erect thread, witli the commencement of s] 



ranimatic). 

 , ^ „. ™^ , „ „. spore-for- 

 mation ; ends of the colourless masses of protoplasm truncated. 

 X 1000. 

 Fig. 2 h. — Part of an erect thread with light brown spores, the ends of 



which are already rounded off. x 1000. 

 Fig. 3. — Erect thread with spore-formation completed. X 1000. 

 Fig. 4. — Separate mature spores. X 1000. 



(little clumps of condensed protoplasm) are formed ; these 

 gradually acquire a brown tint, and then the two flat surfaces 

 by which they were originally bounded at their two poles 

 (fig. 2 a) become rounded off (fig. 2 5), in consequence of 

 which at last the somewhat elongated oval form (fig. 3) is 

 attained. I found the wall of the mature spore to be rather 

 thick. 



It was further particularly remarkable that the spaces be- 



