SAPROLEGN I ALES 



175 



terminal or intercalary, and, in some cases at least, germinate 

 by germ tube. The genus is small, embracing in the treatment 

 of Kanouse (1927: 335) only three species. The inclusion of 

 A. cornpleta Hymphrey is avoided in that its sporangia have not 

 been seen. 



Fig. 65. — Apodachlya pyrifera (Zopf) Pringsheim. (a) Constricted hyphae 

 bearing pyriform sporangia; swarmspores encysting as in Achlya. {b) Sporangia 

 developed sympodially. (c) Sporangium with swarmspores. {d) Young 

 resting spore, (e) Mature resting spore. {After Zopf 1888.) 



3. Sapromyces Fritsch (1893; see also 1892). 



syn. Naegelia Reinsch (1878); see also Thaxter (1894). 

 Naegeliella Schroter (1893). 



In this genus the thallus is differentiated into a trunk and 

 branches, but the trunk corresponds in shape with the branches 

 and is of only slightly greater diameter. It is attached at its 

 base to the substratum, rhizoids being poorly developed or even 

 absent. The branches are definitely constricted at intervals, 

 secondary branches arising at the apices of the segments. A 

 spreading thallus results which is often extensive. The sporangia 



