Coker: Two New Species of Water Molds 
299 
gives a figure (fig. n, plate i) showing a few spores left in the 
sporangium and sprouting there into long tubes. In this para- 
site he records the spores as swimming on leaving the sporan- 
gium, not floating away as in Huxley’s plant. 
Saprolegnia torulosa De Bary: Lechmere, New Phytologist 9: 
305. 1910. In fig. 33, plate 2, is shown a sporangium with 
spores sprouting after the manner of Aplanes. Another ex- 
ample is shown in the same journal 10: 167. 1911, fig. 2, on 
page 175. In his first paper he shows that the second swim- 
ming stage may be suppressed. De Bary in Vergleichende 
Morphologie and Biologie der Pilse, Leipzig, 1884, says (page 
1 17) that the second swimming stage may be omitted in any 
species of Saprolegnia. 
Saprolegnia sp. ? : Pringsheim, Jahrb. fiir Wiss. Bot. 2 : 205. i860. 
In plate 22, fig. 9, is shown a sporangium emptying exactly as 
in Dictyuchus. It is attached to a hypha which also bears a 
sporangium of the normal Saprolegnia type. 
In both Saprolegnia and Achlya it frequently happens that the 
discharge of the spores is only partial, a few, or even a good many 
spores being left in the sporangium. These retained spores may 
emerge from their cysts, as normally, for a second swimming stage, 
moving about within the sporangium until they find their way out 
by its mouth. This is shown by Hildebrand for his Achlya poly- 
andra (not A. polyandra De Bary) (Jahrb. fiir Wiss. Bot. 6: 249. 
1867, plate 16, fig. 2) and by Lechmere for Saprolegnia toru- 
losa (?) (New Phytologist 9: 305, plates 1 and 2. 1910, figs. 
22, 23, 30, 31. Also in vol. 10, fig. 2, page 175). Lechmere erro- 
niously calls this the Dictyuchus type of asexual reproduction. It 
is doubtful if the species of Saprolegnia (a parasite on fish) 
studied by him in his first paper is Saprolegnia torulosa. It is 
more apt to be the one that Huxley studied (Quart. Jour. Micr. 
Sci. 22 : 31 1. 1882) and supposed to be S. monoica. 
Another peculiar and rare variation in the behavior of the 
sporangial contents is described and figured by Horn (Ann. 
Myc. 2: 207. 1904) for Achlya polyandra De Bary (A. De 
Baryana Humphrey). At a temperature of 31 0 to 32 0 Celsius, 
sporangia were formed which emptied large masses of protoplasm 
