CHYTRIDIALES 433 



long by 2 [x in diameter, with a minute rusty-orange globule and a long 

 flagellum, escaping by a basal pore formed near the apophysis ; resting 

 spore not observed. 



Saprophytic in empty submerged exuviae of Phryganeidae, H. E. 

 Petersen (loc. eit.), Sparrow (loc. cit.), Denmark; Odonata (Anisop- 

 tera), Chironomidae, Ephemerida, Sparrow (loc. cit.), exuviae of 

 aquatic insects, Sparrow (1952d: 767), United States. 



Distinct from Rhizoclosmatium globosum not only in the coloration 

 of the globule of the zoospore but also in having larger sporangia and 

 smaller zoospores. 



Rhizoclosmatium marinum Kobayasi and Ookubo 

 Bull. Nat. Sci. Mus. (Tokyo), (N.S.), 1 (2), No. 35: 68, fig. 7. 1954 



"Sporangium interbiotic, subglobose or somewhat flattened, ellip- 

 soidal, sessile, 30-60 \x high, 30-40 \x in diameter, smooth, hyaline, thin- 

 walled. Subsporangial apophysis smaller than sporangium, globose, or 

 fusiform, transversely elongated, sending two or three rhizoids. Rhi- 

 zoids extensive, commonly bilaterally elongated, sometimes very thick 

 at the base, dichotomously or laterally branched, thin-walled. Zoo- 

 spores emerging through a small discharge pore which opens at the 

 base of zoosporangium as a white mass of cyst (vesicle) and then 

 rapidly swimming away separately, ellipsoidal, 7 x 5 \x, hyaline, with 

 a posterior 20 \x long flagellum and an eccentric globule. Resting spore 

 unknown" (Kobayasi and Ookubo, loc. cit.). 



Parasitic on Codium fragile (marine), Japan. 



Distinct from the other species in possessing larger zoospores and in 

 being parasitic on a marine alga. It is possibly a Diplophlyctis sp. 



ASTEROPHLYCTIS H. E. Petersen 



Journ. de Botanique, 17:218. 1903 

 (Figs. 7, p. 94; 27 J-K, p. 428) 

 Mature thallus monocentric, eucarpic, consisting of a somewhat an- 

 gular or stellate sporangial rudiment, apophysis, and rhizoids; spo- 

 rangium inoperculate, formed from the sporangial rudiment; zoo- 

 spores posteriorly uniflagellate, with a single globule; resting spore 



