Manual of the Paleontology of the Cincinnati Group. 



83 



tions given by Mr. Ulrich are the smaller and less prominent spini- 

 form corallites and the more conspicuous groups of larger cells in 

 .S. maculosa. The former are to be observed only on finely preserved 

 specimens. 



68. — M. lamellosa Ulrich, 1890. 



Corallum parasitic, of one or more layers, each one to four or 

 five mm. thick ; surface smooth, showing projecting spiniform 

 corallites; walls of corallites thin below but slightly thickened at the 

 surface; calices eight m two mm., angular; tabulae horizontal, with 

 a few vesicular ones; spiniform corallites moderately numerous, 

 increasing in size toward the surface. (Geol. Sur. Illinois, vol. 8, 

 1890, p. 408.) 



Locality. — Wilmington, Ills. 



Remarks. — This is one of the many recent new species described 

 by Mr. Ulrich. The description is not as complete as many given by 

 that author and it is somewhat difficult to make comparison with 

 other forms. It seems nearly related to M. crustulata and to M. 

 asp era. 



69. — M. dychei James, 1882. 



Corallum sub-fusiform in outline, parasitic on a crinoid column, 

 with rough, nodular swellings, low ridges and annular constrictions ; 

 tapering at each end to a little more than the size of the stem upon 

 which it is growing ; surface with slightly raised, rounded monticules, 

 irregularly distributed, and occupied by calices slightly larger than the 

 average ; corallites radiating from the central object, slightly inclined 

 at first and then curving directly to the outer surface; calices poly- 

 gonal, eight to ten in one line with thin and sharp edges ; tubes with 

 thin walls, angular, and with a few, remote, horizontal and complete 

 tabulae; interstitial cells wanting. (The Paleontologist, No. 6, Sept. 

 12, 1882, p. 56; Jour. Cin. Soc. Nat. Hist., vol. 6, 1883, p. 235.) 



Locality. — Lebanon, O. 



70. — M. fusiformis Whitfield (sp.), 1877. 



Corallum cylindrical, sub-fusiform, straight or curved, pointed or 

 blunt at one or both ends ; a few specimens with a projection at one 

 end, but not like a base ; one-fourth of an inch to an inch long, and 

 from one-half a line to one and one-half lines in diameter; surface 



