72 THE SAPROLEGNIACEAE 



Saprolegnia furcata Maurizio. Alitt d. Deutsch. Fischerei-Vereins 7:48, 

 figs. 13-15. 1899. 



The following is a complete translation except for one or two sen- 

 tences of no importance. By the "conidia" he refers to what are prop- 

 erly known as gemmae or chlamydospores : 



" Found in a crust inside the outlet pipe of an aspirator in the labora- 

 tory, and cultivated for over a year. Turf thin, only 0.5 cm. long on 

 a mealworm, hyphae 5-i8ijl thick, frequently as slender or more so than 

 the stalks of the oogonia, e. g., in several cases the stalks of the entire 

 oogonial group were only 7-i2(x; stalks with short, lateral outgrowths 

 that give them a knotted appearance. Sporangia proliferating as usual. 

 Conidia present. Frequently the zoospores do not escape, but sprout 

 inside, through the sporangial wall. Oogonia in racemes, or one-sided 

 racemes, or they may be reduced to one; not in a true fascicle. A peculi- 

 arity of this species is that the branch of the always present antheridium, 

 after it has enwrapped an oogonium, may divide and bear an oogonium 

 on its end. Such an oogonium can, for its part, have an antheridium 

 of its own. It is usually, but not always, a solitary oogonium that shows 

 this peculiarity. If the oogonial and antheridial stalks are equally 

 thick, it appears as if the hypha forked, carrying an oogonium on one 

 branch and an antheridium on the other which does not form a fertilizing 

 tube. Instead of a fertilizing tube, the antheridium forms an oogonium 

 on its end. Oogonia small, 24.5-41.5:1 thick, almost always round, inter- 

 calary elongated ones rare; borne on slender, short or rather long, much 

 bent or wound stalks. Wall yellowish, pits small, not very obvious or 

 projecting. A tube often enters from the wall below. Eggs 1-9, wall 

 thin, clear yellow, 19.5-22(1 in diameter. Antheridia on almost all oogo- 

 nia, androgynous, springing either from the stalk of the oogonium or 

 the thread that bears it. They branch frequently and attach them- 

 selves to the oogonia. Conidia occur here as described for S. paradoxa, 

 and have no marked peculiarities. On the conidia undeveloped antheridia 

 were observed. 



"The species shows several similarities to 5. mixta. The latter 

 is an intermediate form between S. Thuretl and S. monoica, and it must 

 be emphasized that our species is decidedly not related to 5. Thiireti. 

 Saprolegnia furcata has distinctly smaller oogonia than S. moiwica and 

 differs from it further in the occurrence of the forks which bear an 

 antheridium and an oogonium. As this is a constant peculiarity found 

 in all cultures, it must allow this species to be distinguished as new, 

 and It may be known as 5. furcata." 



saprolegnia curvata Minden. Krypt. Flora Mark B. 5: 609. 1915. 



The following is a much condensed' description of this interesting 

 species, made from the rather long original in German. The sluggish 

 spores and oogonia in chains would suggest that this species might 

 more properly fall in the genus Isoachlya; 



