Manual of the Paleontology of the Cincinnati Group. 



117 



Corallum dendroid, branches cylindrical or sub-cylindrical two to 

 four or more lines in diameter, branching dichotomously ; surface 

 with conspicuous, rounded elevations or monticules, occupied by cells 

 much smaller than the average ; calices irregular in form, circular or 

 polygonal, varying in size ; interstitial tubes occasionally present ; 

 spines, at angles of the cells, conspicuous : walls of corallites thin, 

 internal structure unknown. (The Paleontologist, No. 5, June, 1881, 



P- 36.) 



Locality. — Loveland, O. 



Remarks. — This form seems mainly distinguishable by the groups 

 of cells smaller than the average. Although previously placed as one 

 of the synonyms of the preceeding, it seems to possess characters 

 sufficient to permit its being considered a distinct species. 



80. — M. (Dekayia) pelliculata Ulrich, 1883. 



Corallum dendroid, with smooth, thick, rounded or flattened 

 branches, arising from a broad base, varying in diameter from three 

 lines to one inch ; surface smooth but often with clusters of cells 

 slightly larger than the average, with small aggregations of much 

 smaller cells ; surface also frequently covered with a thin pellicle; 

 spines prominent ; calices angular ; corallites with very thin walls in 

 the axial region, which become thickened toward the surface ; tabula? 

 few in the axial region but more numerous in the peripheral. (Jour. 

 Cin. Soc. Nat. Hist., vol. 6, 1883, p. 150.) (Dekayia appressa \J\r. 

 Ibid, p 152; D.paupera Ulr. Ibid, p. 153.) 



Locality. — Cincinnati . 



Remarks. — There does not seem to be any good characters by 

 which the forms described as appressa and paupera can be separated 

 from pelliculata. They are more varietal than specific. 



Sub genus B. 



Constellaria Dana, 1846. 



Corallum dendroid or incrusting, with the branches cylindrical, 

 flattened, or more or less frondose ; surface with more or less conspic- 

 uous star-shaped, depressed maculae made up of small tubes surrounded 

 by a variable number of (8 to 20) ridges, radiating outward and carry- 

 ing large tubes ; occasionally nearly smooth ; calices oval or circular, 

 with thick walls; corallites of two kinds, the larger circular or oval, 

 with well developed walls which are thickened as the surface is 



