Manual of the Paleontology of the Cincinnati Group. 87 



suspected at the time the description of this species was published in 

 this series of papers (see No. 2) but examination of the internal 

 structure places it beyond doubt. This internal structure is almost 

 identical with M. selwynii given above, so it need not be repeated 

 here. 



76. — M. winchelli James, 1882. 



Corallum sub-circular in outline, spreading to a thin edge, and 

 dome-shaped above; base attached to foreign bodies; surface showing 

 maculae or small monticules with calices slightly larger than the aver- 

 age ; corallites thin walled, curving slightly outward or at times direct 

 to the surface; apertures oval, polygonal, or sub-circular, eight or ten 

 n one line; interstitial cells more or less numerous; angular and vary- 

 ing in form; spiniform corallites numerous; in vertical section tube 

 walls vary in thickness and may sometimes be duplex; tabulae com- 

 plete and horizontal or passing across from one side to the other at 

 varying angles. (The Paleontologist, Sept. 12, 1882, p. 48.) (Non 

 M. winchelli Ulr.) 



Locality. — Lynchburg, Ohio. 



Remarks. — In a previous paper by U. P. & J. F. James already 

 quoted, this species was placed as a synonym of M . hospitalis Nichol- 

 son. This view does not seem any longer tenable and it is restored 

 to specific rank. The M. winchelli of Mr. Ulrich is from the Hamilton 

 group of Michigan and will need to be given a new name. It was 

 described in Geol. Sur. of Illinois, vol. 8, 1890, p. 408. It is a 

 parasitic species but of an entirely different character from the present 

 form. It might, perhaps, be called M. hamiltonense . 



Group VI. Apparently free growing and of anomalous shape. 

 There is only one species referred here : 



a. Shaped like a small wooden shoe 77 



77. — M. calceola Miller & Dyer, 1878. 



Corallum free, of rather small size, helicoid in form, and varying 

 from one line to six lines in diameter ; surface smooth or covered with 

 low rounded monticules ; interior traversed by a horn-shaped cavity 

 lined on the inside by encircling striae, and varying from one-half a 

 line to more than two lines in diameter ; calices approximately equal, 

 polygonal, more or less regularly arranged ; corallites radiating from 



