268 AQUATIC PHYCOMYCETES 



forated; rhizoid arising from the base of sporangium, forked, very 

 obscure. Zoospores formed in large numbers, ellipsoid or subglobose, 

 5-7 [j. in length, posteriorly containing one globule and with a posterior 

 flagellum, 16-17 jx in length. Resting spores not observed" (Ookubo 

 and Kobayasi, he. cit.). 



Human hair and nails used as bait, Japan. 



Rhizophydium subglobosum Kobayasi and Ookubo 

 Bull. Nat. Sci. Mur. (Tokyo), (N.S.), 1 (2) No. 35: 63, fig. 3. 1954 



"Zoosporangium scattered, epibiotic, globose, subglobose or ovoid, 

 sessile, sending a short (9-10 u.) stalk-like penetration tube through 

 host-wall, 30-50 jx long, 30-60 u. in diameter, smooth, hyaline, some- 

 what thick-walled, with one apical broad pit or laterally with several 

 pits. Apophysis none. Rhizoid 3-5 branched just beneath the pene- 

 tration tube, each branchlet moreover dichotomously branched. Zoo- 

 spores numerous, swimming away one by one through pores, spheri- 

 cal, about 6 [x in diameter, with one posterior flagellum and one small 

 globule. Resting spores not observed" (Kobayasi and Ookubo, he. 

 cit.). 



On Bryopsis sp. (marine), Japan. 



The species is said to be allied to Rhizophydium globosum, but dis- 

 tinct from it, in its greater number of zoospores and more extensive 

 rhizoidal system, and from R. marinum, in the larger size of its sporangia. 



SECTION II 1 



Rhizophydium pollinis-pini (Braun) Zopf, pro parte 

 Abhandl. Naturforsch. Gesell. Halle, 17: 82, pi. 1, figs. 16-20. 1887 



(Fig. 17 J, p. 228) 

 Chytridium pollinis-pini Braun, Monatsber. Berlin Akad., 1855:381; Ab- 

 handl. Berlin Akad., 1855:40, pi. 3, figs. 1-15. 1856. 

 Chytridium vagans Braun, Monatsber. Berlin Akad., 1856:588. 

 Phlyctidium vagans (Braun) Rabenhorst, Flora Europaea algarum, 3: 278. 

 1868. 



1 See also the following imperfectly known species of Rhizophydium: 

 R. leptophrydis, p. 312 R. pyriformis, p. 310 



R. persimilis, p. 310 Rhizophydium spp., pp. 310-312 



