390 AQUATIC PHYCOMYCETES 



in germination, each producing one sessile, thin-walled zoosporangium" 

 (Haskins, he. cit.). 



Saprophytic in decaying vegetable debris, boiled leaves of maize, 

 cellophane, and lens paper (Haskins, he. cit.), Canada, United States. 



See the discussion on endooperculation, page 63. 



Diplophlyctis verrucosa Kobayasi and Ookubo 



Nagaoa, 4:58, fig. 45. 1954 



Zoosporangia few, endobiotic, globose, depressed globose or ellip- 

 soidal, thin-walled, hyaline, smooth, 20-50 u, in diameter, with a single 

 apical, basal or lateral, cylindrical, erect or somewhat curved discharge 

 tube about 35-55 \x long; zoospores numerous, hyaline, about 6 u, in 

 diameter with a single retractive globule and long posterior flagellum; 

 apophysis small, subglobose, thin-walled, hyaline, the rhizoids basally 

 or bilaterally attached, tapering and dichotomously branched; resting 

 spores globose, 40-50 \x in diameter, with a thick, verrucose wall, pale 

 yellow-brown, with a large oil globule, the apophysis and rhizoidal 

 system like that of the sporangium, germination not observed. 



Parasitic in Chora fragilis, Japan (Ookubo). 



Very distinct from the other species in the constantly verrucose 

 character of the resting-spore wall; less obviously so in the sporangial 

 stage. 



Diplophlyctis laevis Sparrow 



Occ. Papers Boston Soc. Nat. Hist., 8: 296. 1937; Papers Mich. Acad. Sci., 

 Arts, Letters, 24 (1938), Pt. I: 121, pi. 1, figs. 1-14. 1939 



(Fig. 23 D-l, p. 385) 



Sporangium broadly or irregularly pyriform, 20-35 jo. long by 13-35 

 pi in diameter at the base, with a subspherical, subsporangial, or lateral 

 apophysis 4-5 [jl in diameter, from which one or several stout branching 

 rhizoids emerge, discharge tube broad, tapering, of variable length (up 

 to 50 u,), its tip penetrating the host wall and generally protruding only 

 slightly beyond it; zoospores spherical, 7 \i in diameter, with a single 

 colorless oil globule 3 u. in diameter and a posterior flagellum 30 jj. long; 

 resting spore spherical or ellipsoidal, 1 1-18 by 12-18 [x, with a smooth 



