CHYTRIDIALES 149 



of the host, filling or partly filling the host cell. 



In Bangia fuscopurpwea and Hormidium penicilliformis, Germany. 



? Olpidium laguncula H. E. Petersen 



Oversigt. Kgl. Danske Vidensk. Selskabs. Forhandl., 1905 (5): 



466, fig. I, 1-2 



Sporangium variable in shape, more or less spherical or irregularly 

 bottle-shaped, 12—45 [x long by 13-33 (j. in diameter, with a thin 

 smooth wall, discharge tube 10—55 p. in length; other characters un- 

 known. 



In Dumontia filiformis, Petersen (loc. cit.), Denmark; D. incrassata, 

 Aleem (1953:5, figs. 1-4), Sweden; coll. Lodge, Aleem {loc. cit.), 

 Isle of Man. 



? Olpidium lauderiae Gran 



Nyt Mag. Naturvid., 38 (2): 123, pi. 9, figs. 8-9. 1900 



Sporangium broadly ovoid, slightly irregular and bent, discharge 

 tube broad and short, penetrating the wall of the host, the border of 

 the orifice somewhat recurved and flangelike. 



On Lauderia borealis, Norway (fixed material). 



Said to be a species of Eurychasma by Petersen (1905:469), who 

 calls it E. lauderiae (Gran) H. E. Petersen, but considered a species 

 of Ectrogella by Scherffel (1925a: 3), who applies to it the binomial 

 Ectrogella lauderiae (Gran) Scherffel. Until the zoospores are observed 

 it is impossible to say which of the three available combinations 

 should be used. 



Aleem (1953:21) reports on finding, in Lauderia cells, "chytridia- 

 ceous zoospores similiar to those of Ectrogella,"'' a rather anomalous 

 statement. 



? Olpidium marinum Dangeard 



Le Botaniste, 12: xvi, pi. 2, figs. 23-24. 1911 (1912) 



Ectrogella marina (Dangeard) J. and G. Feldmann, Suppl. 6, Travaux de la 

 Station Biologique de Roscoflf, p. 133. 1954. 



Sporangium spherical, with a more or less elongate discharge tube 



