444 AQUATIC PHYCOMYCETES 



golden globules, upon germination functioning as a prosporangium. 1 

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

 Brazil; United States. 



Karling separated this species from Rhizophlyctis rosea, with which 

 it occurred in the same culture, on the basis of the character of the 

 resting-spore walls. He cited other minor differences, such as number 

 of zoospore globules and color. A few of the intramatrical resting 

 spores had empty zoospore cases and germ tubes attached. 



Rhizophlyctis chitinophila (Karling), comb. nov. 

 Karlingia chitinophila Karling, Mycologia, 41 : 506, figs. 1-8. 1949. 



Sporangia for the most part wholly extramatrical, hyaline, smooth- 

 walled, spherical and 10-215 \i, oval and 15-30 by 20-45 u., pyriform 

 and 32-50 by 60-100 [i,, citriform, elongate or angular or irregular, with 

 one to twenty-six discharge papillae or tubes, 12-70 u. long by 5-8 u. 

 in diameter, the ends of which possess a hyaline glutinous plug, which 

 may protrude 5-15 [i, above apex; rhizoids for the most part emerging 

 from several places on the sporangium, main axes usually coarse, 

 attaining a diameter of 20 [x, much branched and extensive; endo- 

 operculum thin, hyaline, submerged in the exit papilla or tube, shallowly 

 convex, up to 1 2 [x in diameter, expelled and carried away at zoospore 

 discharge, accessory opercula drawn back into sporangium; zoospores 

 hyaline, spherical, 3.18-3.71 [i in diameter, bearing numerous minute 

 granules, flagellum 22-24 ji. long; resting spore smooth- walled, spherical 

 and 8-26 [i, oval and 8-18 by 11-23 y., oblong, angular or 

 irregular, greenish brown, with a wall 2-6.3 u, thick, sometimes with 

 faint radial striations, contents coarsely granular, functioning as a 

 prosporangium at germination. 



Saprophytic on chitinous substrata in soil and water, Karling (loc. 

 cit.), United States; moist soil, coll. J. T. Baldwin, Karling {op. cit., 

 508), Liberia. 



Rhizophlyctis chitinophila is considered by Karling to be the hyaline 



1 This description and those of the following two species have been compiled 

 from Karling's text, as well as from his technical Latin descriptions, in order to fill 

 out essential morphological detail. 



