FULIGO 27 



already in use in the genus Physarum. Zopf, Die Pilzthiere, p. 149, 

 founds a new genus on what seems to be the same form as here con- 

 sidered. This he publishes as Mthaliopsis stercoriformis Z. Massee 

 regards the specimens discovered by Zopf as belonging to the genus 

 Fuligo, and Lister regards Rostafinski's type as Fuligo, and includes 

 Zopf's material under the Rostafinskian species. 



This has been described as properly an American form; Lister 

 cites other far localities. 



3. Fuligo septica {Linn.) Gmel. 



1753. Mucor septicus Linn., Sp. PI. II., No. 1656 (?). 



1763. Mucor ovatus SchaeflF., Furtff. Ba<v., p. 132, Fig. 192. 



1791. Fuligo septica (Linn.) Gmel., Syst. Nat., p. 1466. 



1826. Fuliffo varians Sommf., Fl. Lapl. Sup., p. 231. 



1809. jEthalium fiavum Link, Diss., I., p. 42. 



1829. jEthalium septicum Fr., Syst. Myc, III., p. 93. 



1875. Fuligo varians Sommf., Rost., Man., p. 134. 



1892. Fuligo varians Sommf., Macbr., Bull. Lab. Nat. Hist. la. II., p. 160. 



1894. Fuligo septica (Linn.) Lister, Mycetozoa, p. 66. 



1899. Fuligo ovata (Schaeff.) Macbr., N. A. S., p. 23. 



1911. Fuligo septica Gmel., Lister, Mycetozoa, 2nd ed., p. 86. 



This remarkable and universal species presents as stated many 

 forms and phases. Of these five have been selected as representative. 



1. Form a. Plasmodium yellow; cortex yellow, or orange-brown, strongly 



calcareous friable; form indefinite F. ovata 



2. Form b. Cortex less calcareous porose, yellowish brown, fructification 



definite, pulvinate F. rufa 



3. Form c. Cortex smooth, persistent; fructification small, less than two 



inches F. laevis 



4. Form d. Plasmodium yellow; cortex none; capillitium yellow, fructifica- 



tion thin, sometimes wide-spread F. flava 



5. Form e. Plasmodium violaceous, dark; cortex almost none; whole mass 



reddish or violet F. <violacea 



1. Form a. Fuligo ovata (Schaeff.) Pers. 



Plasmodium bright yellow; aethalium pale brown, or yellowish- 

 ochraceous, of variable size and shape, one to many cm. in diameter, 

 and one to two cm. thick, enclosed by a distinct calcareous crust, 



