CHYTRIDIALES 563 



only one to two exit papillae without hyaline plugs. K. marilandicus 

 also may occasionally form very long exit tubes on its thicker walled 

 sporangia. 



Karlingiomyces granulatus (Karling), comb. nov. 

 Karlingia granulata Karling, Mycologia, 39:57, figs. 1-22. 1947. 



Sporangium hyaline, smooth-walled, spherical (8-240 \x in diameter), 

 pyriform (6-50 by 10-120 (x), oval (8-60 by 10-90 fx), elongate, or 

 irregular; with one to five exit papillae or tubes (5-8 by 7-110 fx); 

 rhizoids emerging usually from several places on the sporangium, 

 principal axes for most part coarse, up to 12[x in diameter, often con- 

 stricted and irregular in outline with conspicuous internal trabeculae, 

 the walls becoming thick and brown with age; operculum hyaline, 

 delicate, apical or submerged in the discharge papilla or tube, slightly 

 convex, 15 [jl in diameter; zoospores hyaline, spherical, 5.5-6.5 [i, 

 bearing 10-40 minute granules in their plasma, flagellum 35-40 fx long; 

 resting spore smooth or rugose, brownish, with a thick wall 2.0-3.5 fx 

 thick ("diam."), spherical (6-25 jx) or oval (10-20 by 13-25 (x), at 

 germination functioning as a prosporangium. 



Saprophytic on vegetable debris, in moist soil, Karling (be. cit.), 

 Brazil; isolated from moist soil, Karling (1948c: 509), United States; 

 from soil, substrate ?, Gaertner (1954b: 22), Egypt, Equatorial East 

 Africa, South Africa. 



A few (five) thalli (of the great many studied) were polycentric. As in 

 Septochytrium, they had a large primary sporangium and one to three 

 secondary ones. 



Karlingiomyces lobatus (Karling), comb. nov. 



Karlingia lobata Karling, Mycologia, 41: 515, figs. 52-69. 1949. 



Sporangium hyaline, spherical (15-180 [x in diameter), pyriform (12- 

 40 by 20-160 jx), oval (9-80 by 14-98 fx), oblong, elongate, or irregu- 

 lar, with one to four exit papillae, wall in large as well as in old sporan- 

 gia thick and wrinkled or ridged, extending sometimes to the concomi- 

 tant rhizoids; rhizoids for the most part emerging from several places on 

 the sporangium, main axes usually coarse, fairly thick-walled, irregular- 



