1896. ] Aquatic Fungi. 325 
until we have more definite information by means of which 
its true position may be finally determined; and also that the 
form described by Humphrey asA podachlya completa has been 
omitted, in view of the fact that the non-sexual reproduction 
of this remarkable plant was not observed and that the nature 
of the sexual process described must remain a matter of great 
uncertainty until further observations can be made upon it. 
LEPTOMITACE4.—Filaments segmented through the 
Presence of successive constrictions. Oogonia containing a 
single oosphere surrounded by periplasm. 
} GonaPODYA.—Typical segments short and broad. Spo- 
fangia pod-shaped, successively several times proliferous. Zo- 
‘spores I-ciliate (always ?). 
wo species: G. sz/iguaeformis (Reinsch) Thax., Europe and 
America; G. polymorpha Thax., America. 
LEPTOMITUS.—Filaments slender branched, the segments 
long cylindrical. Non-sexual reproduction effected by the 
‘onversion of a terminal or of several superposed segments 
into zoosporangia which are but slightly ifat all differentiated. 
Oospores unknown. 
One species: ZL. dacteus Ag., Europe and America. 
PPODACHLYa,—-Filaments simple or sparingly branched. 
Sporangia terminal, or originally terminal, becoming appat- 
ently lateral through the sympodial branching of the segments 
Which bear them, broadly oval or piriform and distinctly dif- 
ferentiated from the segments. Zoospores becoming encysted, 
*1n Achlya, immediately after their exit from the sporan- 
eu (always ?), diplanetic. Oospores unknown. ai 
Pri WO species: A. pirifera Zopf, and A. brachynema Lasts 
‘ings. (probably synonymous), America (Thaxter) and Bu- 
Tope, 
veloped 
he nu- 
egy filaments to which it gives rise, 
“ler simple lobed or branched. The filaments appare 
nal sporangia. Zoosporangia for the 
Oval, the zoospores biciliate, 
Ylindrica , hin membrane a 
mounted by the papilla of dehiscence; monoplanetic, cies 
