138 British Fungi. 



Achlyn, Xee?, Nov. Act. Leop. xi. 2, p. 514; Sacc. 



Syll. vii. p. 274. 



A. Monoecious. 



Achlya poJijandra, HildelDrand (fig. 31). 



Mycelium branched ; oogonia globose or broadly 

 elliptical, large, up to 150 /u diameter, not perforated; 

 oospores numerous, globose, smootb, brown, 25 /j, 

 diameter ; antlieridia 2 — 6 attaclied to one oogonium, 

 terminal on simple or divided, slender, llexuous branches 

 sprinoring from the hypha supporting the oogonia; 

 zoosporangia apical, cylindrical, slender, very long. 



Achlya polyandra, Hildebrand, in Pringsheim's 

 Jahrb. vi. t. xvi. fif. 7 — 11 ; Sacc. Syll. vii. n- 941. 



On putrid insects in water. Eare. 



B. Dioecious. 



Achlya cornuta, Archer. 



Plant dioecious; oogonia large, mostly terminal, often 

 in an interrupted series, the outer wall drawn out into 

 numerous horn-like extensions of varying and ofteu 

 considerable length, sometimes bifid ; the apex of the 

 terminal one drawn out generally very long, and occa- 

 sionally the supporting filament or stem giving off 

 lateral branches by a kind of proliferous growth, each 

 of which eventuallv terminates in an oocronium of 

 similar character, but usually of smaller size ; oospores 

 large, one or several in an oogonium ; mother cells of 

 spermatozoids (zoogonidia) as in Achlya dioica. The 

 uppermost oogonium is the first or oldest formed, the 

 lowest the voungrest or last formed in the series. 



Achlya cornuta, Archer, Quart. Journ. !Micr. 

 Science, vol. vii., new series (lb67), p. 127, pi. vi. 

 figs. 2—6. 



