560 AQUATIC PHYCOMYCETES 



Zoospore with numerous globules 



Resting spore spherical or oval, brown, with a somewhat rough wall 



K. gramilatus, p. 563 

 Resting spore deeply lobed or irregular, hyaline, with a smooth wall 



K. lobatus, p. 563 



Karlingiomyces asterocystis (Karling), comb. nov. 

 Karlingia asterocysta Karling, Mycologia, 41 : 509, figs. 9-19. 1949. 



Sporangium hyaline, smooth-walled, sphercal (20-1 10 \x in diameter), 

 pyriform (12-40 by 29-75 jj.), oblong, elongate, fusiform, or irregular, 

 in large sporangia with one to four low, barely perceptible discharge 

 papillae (8-14 u. in diameter) surmounting a broad hyaline hemispher- 

 ical area up to 15 fx wide and 16 u. deep, papillae in small sporangia 

 fairly conspicuous and up to 11 [x high ; rhizoids for the most part 

 emerging from several places on the sporangium, the main axes attaining 

 a diameter of 18 [x, branching and extensive; operculum hyaline, shal- 

 lowly convex, 14 u. in diameter, terminating the papilla; zoospores 

 hyaline, spherical, 4.2-4.6 jx in diameter, with a hyaline refractive glob- 

 ule, 0.7-1. 2 u. in diameter, and a flagellum, 24-26 fx long, after discharge 

 swarming for a short time in a quickly evanescent vesicle; resting spore 

 subspherical (15-30 jx in diameter), oval (12-16 by 14-22 fx), oblong, 

 angular, or irregular, the dark greenish-brown wall covered with blunt 

 to sharp-pointed, occasionally curved conical pegs, 4-8 fx high by 2-4 u. 

 broad at base, rarely verrucose, contents hyaline and finely granular, 

 germination not observed. 



Saprophytic on chitinous substrata, in soil and water, United States. 



Resting spores were formed in greater abundance than sporangia in 

 this species. The discharge papilla of the sporangia were scarcely discern- 

 ible and their position was usually determined by the conspicuous 

 hyaline material beneath them. 



Karlingiomyces curvispinosus (Karling), comb. nov. 



Karlingia curvispinosa Karling, Mycologia, 41: 511, figs. 20-35. 1949. 



Sporangium usually sessile, rarely stalked, hyaline, smooth-walled, 

 variable in shape and size, subspherical (10-120 \x in diameter), oval 



