212 THE NORTH AMERICAN SLIME-MOULDS 



or inflated, lobate or compound, covered by an exceedingly thin, gen- 

 erally smooth, shining, but never white, pellicle or cortex, brown, 

 from 1—6 cm. in diameter; hypothallus white, often wide ex- 

 tending; capillitium none; the sporangial walls thin and brown 

 forming a network as above described; spore-mass umber, spores by 

 transmitted light pale, about two-thirds of the surface reticulate, the 

 rest nearly smooth, 7-9 /x. 



Very common, especially west, on decaying logs and stumps of 

 every description. Easily distinguished by its brown color and smooth, 

 shining, though uneven surface. The Plasmodium as it emerges to 

 form fruit is pale pink or flesh color, slowly deepening to brown as ma- 

 turity advances. The first emergence is a watery white. 



New England, Canada, to Minnesota and Nebraska, South Da- 

 kota, 



In 1876 Rostafinski provisionally referred to the genus Reticularia 

 certain specimens received from M. Roze of Paris. Thirteen years 

 later in correspondence with M. Roze, Mr. Wingate satisfied himself 

 that the specimens discovered by Roze were the same as our common 

 enteridium. He therefore, /. c, applied to our American forms the 

 name they have widely borne, E. rozeanum. Mr. Lister, Jour, of 

 Botany, Sept. '91, applied the Rostafinskian name to ertain English 

 specimens. Thereafter to be known as Reticularia lobata Rost. and so 

 fixed the status of that species. From all the literature before us 

 it appears that Mr. Lister w^as right. R. lobata List, (now Liceop- 

 sis lobata (List.) Torr., occurs in various parts of Europe, while our 

 American species of Enteridium is yet to be discovered on that side of 

 the sea! 



Were the latter native to the old world at all, it had surely been seen 

 long ago. It is large and fine, and could not have escaped the famous 

 collectors of the last two hundred years. Although it has been sent 

 by students from this side of the ocean to Europe for more than 

 thirty years, it has not even adventitiously appeared. 



It therefore appears that our American species is known to Europe 

 through Mr. Wingate's reference only. 



Tw^enty years ago in correspondence with Mr. Wingate it was 

 learned that the material received by him from M. Roze was but 



