Coker: Two New Species of Water Molds 
297 
that sporangia occur which show cell nets after the escape of 
the spores. He also says that in most cases after the emergence 
of the spores the cell nets are not visible, indicating that they 
disappear soon. His implication throughout is that the spores 
always escape as in Dictyuchus, and one of his figures (fig. 5, 
plate 14) clearly shows this method. However, in fig. 2 he 
shows two sporangia attached to an oogonium which are empty 
and show distinct openings for the discharge of the spores. In 
fact Reinsch did not observe at all the “ Aplanes type ” of spore 
germination as De Bary later described it (Bot. Zeit. 46: 651. 
1888). When we remember that De Bary speaks of the 
sporangia as of great rarity, it seems to me that we are entirely 
unjustified in asserting that the spores of Aplanes have no 
swimming stage. All of Reinsch’s testimony is the other way, 
and as Fischer says (Kryptogamen Flora von Deutschland, etc., 
p. 367. 1892) there can be no doubt that Reinsch’s plant and 
De Bary’s are the same. In his description of the genus 
Fischer admits that net sporangia (as in Dictyuchus ) seem also 
to occur occasionally. 
Apodachlya pirifera Zopf : Nova Acta Kel. Leop. Carol. Akad. 
der Naturforscher 52 : 313. 1888. The spores normally encyst 
at the mouth of the sporangium and then emerge for a swim- 
ming stage as in Achlya. However, they may, on occasion, 
swim away in emerging, or they may encyst in part in the 
sporangium. 
Dictyuchus monosporus Leitgeb: Jahrb. fiir Wiss. Bot. 7: 357. 
1867-70. In plate 23, fig. 8, is shown a sporangium with spores 
sprouting after the manner of Aplanes. This variation I have 
many times seen in an undescribed species of Dichtyuchus that 
is common at Chapel Hill. 
Leptomitus lacteus (Roth) Agardh : Humphrey (Saprolegnia- 
ceae of the United States, etc.), says on page 136: “While the 
zoospores ordinarily escape from the sporangia, they sometimes 
become encysted within them (Fig. 117). It is this fact, prob- 
ably, which led Braun to state (’51) 12 that the spores of Lepto- 
12 This refers to A. Braun. Betrachtungen iiber die Erscheinung der Vor- 
jungung in der Natur. Leipzig, 1851. Also translated by Henfrey, Ray So- 
ciety, London, 1853. 
