156 AQUATIC PHYCOMYCETES 



fungus, found in the claw of a dead crustacean in European and Asi- 

 atic Russia, lias a spherical sporangium and a narrow discharge tube. 



The original description is too lacking in essential information to 

 make it possible to refer any fungus to the species. 



EXCLUDED SPECIES OF OLPIDIUM 



* Olpidium ellipticum (Dang.) Saccardo and Traverso 



Sylloge fungorum, 20: 217. 1911 



Minutularia clliptica Dangeard, Le Botaniste, 2: 241, pi. 16, figs. 29-31. 

 1890-91. 



Saccardo and Traverso have placed Dangeard's organism in the 

 chytrids, although Dangeard states that it ingests solid particles of 

 food and is a monad. 



* Olpidium indicum Wallich 



Turner, Bih. Kgl. Svensk. Vetensk.-Ak. Handl., 25, Afd. 5, No. 10: 164, 



pi. 21, fig. 8. 1892 



On Oedogonium sp. Unquestionably a choanoflagellate. 



* Olpidium lacerans de Bruyne 



Arch, de Biol., 10: 104, pi. 5, figs. 28-31. 1890 



Not a fungus. The zoospores contain chlorophyll residue. The 

 figures refer to the monad Aphelidium lacerans. 



* Olpidium plumulae (Cohn) Fischer 

 Rabenhorst. Kryptogamen-Fl., 1 (4): 27. 1892 



Chytridium plumulae Cohn, Hedwigia, 4: 169. 1865; Schultze, Archiv. 



micro. Anat., 3: 59, pi. I, figs. 21-23. 1867. 

 Phlyctidium plumulae (Cohn) Rabenhorst, Flora Europaea algarum, 



3: 279. 1868. 



Sporangium inducing a rudimentary branchlike outgrowth of the 

 host wall, ovoid or subglobose, lying between the wall and the host 

 contents, without rhizoids, 15 (x in diameter, reddish or dark red; zo- 

 ospores very numerous, discharged through an irregular lateral opening. 



