394 AQUATIC PHYCOMYCETES 



long. Zoospores oval or oblong (2-2.5 x 3.8-4.5 [jl) with non-guttulate, 

 finely granular content and a slightly tapering posterior end; flagellum 

 12-14 \x long. Rhizoids richly branched, usually arising from several 

 points on surface of sporangium, main axes up to 8 jx in diam. and 

 extending for a distance of 250 \x. Resting spores (?) or thick-walled, 

 dormant sporangia of same size and shape as zoosporangia, hyaline, 

 smooth; functioning directly as zoosporangia in germination" (Kar- 

 ling, he. cit.). 



Saprophytic in dead keratinized tissues of animals, Karling (loc. 

 cit., 1948c), Brazil, United States; Karling (1951b), Alaska; Karling 

 (1951b), Israel; from soil, substrate?, Gaertner (1954b: 22), Egypt, 

 Northwest Africa, West Africa, Equatorial East Africa, South 

 Africa. 



See also remarks under the following species. 



? Phlyctorhiza peltata Sparrow 

 J. Wash. Acad. Sci., 40: 50, figs. 1-7. 1950 



Thallus monocentric, rarely polycentric, resting on the surface of 

 the substratum; rhizoids arising from several places on the thallus, 

 3 [ji or less in diameter at point of origin, tapering and moderately 

 branched distally; zoosporangia irregularly and elongately peltate, 

 15-28 u. along the long axis, 5-12 \x along the shortest; at maturity 

 forming a single papilla, which at maturity deliquesces to form a sessile 

 exit pore 5 \x in diameter; zoospores ovoid, 4 by 2 \l, with a minute 

 refractive droplet and a long posterior flagellum attached to the narrow- 

 er end of the body; resting spores not observed. 



Saprophytic on snakeskin in stream, Cuba. 



If this proves to be a species of Phlyctorhiza, it certainly differs 

 strikingly from P. endogena in the shape of its sporangia. 



This species and the preceding one seem to be better accommodated 

 in Entophlyctis rather than Phlyctorhiza, reserving the latter genus for 

 types which, as emphasized by Hanson(1946b) in her comparison with 

 Rhizophlyctis, develop their sporangia by vesication or expansion of 

 elements of the rhizoidal system. 



