PBTCH : THE FUNGI 



in the interior the majority are oval orcylindric, 8—20 x 6 p. 

 In the latter rase the inflated apical cell of the hypha usually 

 bears al first two primary "conidia": these elongate and 

 de transversely, the process being continued indefinitely 

 by the terminal cell. Meanwhile new cells arise by budding 

 immediately below each septum and divide in the same way. 

 so that a branched system of united "conidia'" is finally 

 produced. Steps of tins process are shown in fig. 9. 



On the other hand, the spherical "conidia" are generally 

 arranged in chains of three or four which increase by the 

 apical budding of the terminal cell : the production of the side 

 buds appears to be less pre\ alenl I han in the ova] form (fig. X). 



The two branches "l one hypha may give rise to spherical 

 and oval cells respectively (fig. 1). or a branch which is produc- 

 ing spherical cellfl may bud off side blanches which form oval 

 cells only. Hyphae in the middle of the sphere often produoe 

 a succession of oval Bwellinga before forming " conidia " dig. 4): 

 these are not separated by cross walls, and resemble the swell- 

 in.:- on the creeping mycelium. 



The sphere'is easily teased out into it> component branches, 

 or by slight pressure on the cover glass these may be caused 

 to radiate and thus make clear theii internal arrangement. 

 The extremities onlj of these branches are shown in the 



figures, the did mous branching of the original stalk hypha? 



being omitted The cells arc filled with protoplasm, vacuoles 

 not hem- observable. Some of the youngest Bpheres appeal 



to consisl of oval cells only. 



If a piece of COmb i- placed in a damp chamber the spheres 



mi-transparenl and acquire a halo-like fringe of 

 i radiating hyphae. In the oourse of twenty-four hours 



they turn yellow, shrink to about half their former si/.e. and 



i l tonally some growth is obtained. In one ,-\ 

 ment all spheres above '25 mm. diameter were removed : 

 on the following daj jomeofthe small ones left hadinores 



i mm. diameter, but by the aexl day all had beoom< 

 yellow and coinmenoed to decay. Variations of aioisture ami 



