ENTERIDIUM 1 5 1 



ceedingly delicate but sufficiently persistent sponge. The "net- 

 like, three-winged skeleton " referred to by Rostafinski results 

 from the union at one point of three adjoining sporangia. Com- 

 pare the section of the adjoining cells of a honeycomb. In our 

 territory so far occurs but one species, 



i. ENTERIDIUM SPLENDENS Morgan. 



PLATE I., Figs, i, i a, \b; PLATE XII., Figs. 4, 5. 



1889. Enteridium rozeamim (Rost.) Wingate, Proc. Phil. Acad., p. 156. 



1892. Enteridium rozeamim Wingate, Macbr., Bull. Lab. Nat. Hist. Iowa, 



II., p. 117- 



1893. Reticularia splendens Morg.,J0ur. Cin. Soc., p. u. 

 1899. Enteridium splendens Morgan, Morgan in litt. 



./Ethalium pulvinate, even, or somewhat irregular, unevenly 

 swollen or inflated, lobate or compound, covered by an exceed- 

 ingly thin, generally smooth, shining, but never white, pellicle 

 or cortex, brown, from 1-6 cm. in diameter ; hypothallus white, 

 often wide extending ; 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 p. 



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. 



In 1876 Rostafinski provisionally referred to the genus 

 Reticularia certain specimens received from M. Roze of Paris. 

 In correspondence with M. Roze, Mr. Wingate satisfied himself 

 that the specimens discovered by Roze were the same as our 

 common Enteridium. He, therefore, I.e., applied to our Ameri- 

 can forms the name they have since borne, E. rozcanum. Mr. 

 Lister, Jour, of Botany, September, 1891, confused the matter 

 by referring an English species now known as R. lobata to the 

 same species. From all the literature before us it appears that 

 the American form is known in Europe only through Mr. 

 Wingate's reference. All now turns on the nature of the 



