50 THE NORTH AMERICAN SLIME-MOULDS 



united with a hypothallus which is more or less widely produced; 

 capillitium rather scant, but abundantly charged with polygonal nod- 

 ules of lime, yellow; spore-mass black; the spores, by transmitted 

 light, violaceous, warted, globose, 10-13 fx. Plasmodium, at matu- 

 rity, greenish-yellow. 



A very distinct species not likely to be confused with anything 

 else, although in description, so far as concerns external characters, 

 suggesting Cienkowskia reticulata. The two forms are not at all 

 alike when placed side by side. For details as to the difference, see 

 the description of the species last mentioned. 



Apparently not rare in eastern United States, Pennsylvania, Vir- 

 ginia, Ohio, Iowa. 



In 1805, Albertini and Schweinitz, Conspectus Fungorum, p. 251, 

 t. 7, Fig. 2, described as Physarum reticulatum, a European form 

 which became the basis of Rostafinski's genus Cienkowskia; see under 

 that genus. Later, 1829, Schweinitz discovered in America a phys- 

 arum-looking specimen which he took to be the same thing, and 

 accordingly placed in his herbarium under this name, and entered 

 A^. A. F. 2295. Rostafinski further re-named another Schwein- 

 itzian species Fuligo muscorum calling it, Mon., p. Ill, Physarum 

 gyrosum. Wingate and Rex apply in Ellis, N. A. F., this latter 

 name to No. 2295 of Schweinitz. Such a reference is a mistake, judg- 

 ing from Rostafinski's descriptions and from the description and 

 figure of Albertini and Schweinitz (Consp. Fung., p. 86, t. 7, I), 

 and by the testimony of Lister. For further concerning Rostafinski's 

 species, see under Physarum gyrosum, p. Ill, Mon, 



2. Physarum lateritium {Berk. £sf Rav.) Rost. 



1873. Didymium lateritium Berk. & Rav., Grev., II., p. 65. 



1875. Physarum ditmari lateritium Rost., Mon., App., p. 9. 



1879. Physarum inequale Peck, Rep. N. Y. Mus., XXXI., p. 40. 



1892. Physarum chrysotrichum Berk. & C, Massee, p. 300. 



1894. Physarum inequale Peck, Lister, Mycetozoa, p. 60. 



1896. Physarum lateritium (Berk. & Rav.) Morg., Jour. Cin. Soc, p. 95. 



1899. Physarum lateritium (Berk. & Rav.) Morg., Macbr., N. A. S., p. 33. 

 p. 33. 



1911. Physarum lateritium Morg., List, Mycetozoa, 2nd ed., p. 82. 



