8 4 



Cincinnati Satiety of Natural History. 



smooth ; calices very small, oval or sub-circular, without any regular 

 arrangement, ten or twelve in one line ; intercellular spaces marked by 

 scattered pits, by a depressed groove, or by an elevated, ridge-like 

 line ; walls of corallites tolerably thick ; corallites more or less poly- 

 gonal, separated by spaces with very fine lines; cell walls in the axial 

 region very thin, somewhat tortuous until the surface is approached 

 where they open obliquely ; no tabulae in the central portion, but 

 near the surface closely but faintly tabulate ; in transverse section the 

 corallites in the central portion have a chain-like or recticulated 

 appearance. (Ann. Rept. Geol. Sur. Wise, 1877, p. 70, as Chcetetes. 

 Geol. of Wise, vol. 4, 1882, p. 248.) (M. subfusiformis James, The 

 Paleontologist, No. 6, 1882, p. 52.) 



Locality. — Warren and Clinton Counties, Ohio ; Iron Ridge, 

 Wisconsin. 



Remarks. — The above was originally described from rocks of the 

 Hudson River group in Wisconsin, at Iron Ridge. The form 

 described as M. subfusiformis U. P. James, is evidently the same. 

 Prof. Whitfield does not describe the internal structure, and this is 

 taken from Mr. James's description of M. subfusiformis . 



71. — M. clavacoidea James, 1875. 



Corallum forming a crust and generally cylindrical, clavate or 

 fusiform, receiving its shape from the tapering ends of small species of 

 Orthoceras or other cylindrical objects, to which it is attached by the 

 whole of its base; surface either smooth or elevated into low monti- 

 cules, occupied by tubes slightly larger than the average ; calices 

 polygonal, nearly equal in size; no interstitial cells; corallites thin 

 walled and directed at right angles to the base ; tabulae when present 

 complete and horizontal, but absent in the greater part of the corrallites; 

 corallites increased in numbers by the interpolation of new ones. 

 (Cat. Foss Cin. Gr., 1871 (named only); Cat. Low. Sil. Fos., 2nd 

 ed., 1875, P- h as Chcetetes clavaeoideus. (Leptotrypa minima Ulrich, 

 Jour. Cin. Soc. Nat. Hist., vol. 6, 1883, p. 159.) 



Locality. — Cincinnati, O. 



Remarks. — The species described by Mr. Ulrich as Leptotrypa 

 minima does not seem to present a sufficient number of characters to 

 justify its separation. In point of fact the description given for it 

 would fit almost exactly the species described by Mr. James as 

 Monticulipora clavacoidea. It might be well to state here that Mr. 



