226 NEW YORK STATE MUSEUM 



and have the smallest swelling belonging to any species, though 

 the mycelium has a diameter about the same as the foregoing 

 species. 



All of the above are found on sectipning the firmer parts of the 

 Clinton hematite layer, which is an aggregation of rolled bits of 

 bryozoa, corals, brachiopod shells and Crustacea, each fragment 

 being coated by concentric layers of hematite, making an oolitic 

 structure. If one accepts the theory that all oolites are formed 

 by concentric coatings precipitated by algae, then these oolites 

 must indicate the presence of other plants in the Clinton sea. 

 This oolitic formation is described by C. H. Smyth jr,i who care- 

 fully describes the process of concentric precipitations, but (Joes 

 not assign algae as a cause. This author describes the condi- 

 tions prevailing at the time the hematite layer was deposited as a 

 swampy shore of an inland sea. 



Such fungi as those above described are common through 

 Mesozoic and Cenozoic time, and have been found at least once 

 before in Siluric beds.^ 



^Zeitsch. f. Praktische geologie. August 1894. See also Amer. jour. sci. 

 (3) 43, p. 487. 



''KoUiker (loo. cit.) says he found his P a 1 a e a c h 1 y a in an Upper 

 Siluric Cya thophyllum and a Lower Siluric f oraminif er from 

 Europe, but he does not figure either. 



