On the Montiadiporoids of the Cincinnati Group. 183 



Callopora nodi/Iosa, Nich. Ulrich, Jour. Cin. S. N. Hist , V., 

 252, 1882; VI., 83, 1883. 



Corallum minute, dendroid ; stems varying from two-thirds of 

 a line to one line in diameter, branching at intervals of two lines. 

 Surface with numerous conical or transversely elongated monticules. 

 Calices oval, the long axes corresponding with the long axis of the 

 corallum, opening obli(iuely. Walls thickened at the surface. In 

 terstitial corallites numerous, nearly enclosing the larger cells, 

 angular or sub-angular. 



Obs. This species is mainly distinguished by the small coral- 

 lum, the closely set, sharply pointed monticules and elongated 

 calices. 



Formation and Locality ; Lower Silurian, Cincinnati Group, 

 Loveland, Ohio. * 



32. M. NEWPORTENSis, Ulrich. 



Atactoporella ncwportensis, Ul. Jour. Cin. S. N. Hist., VI., 

 250, 1883. 



Corallum sub-ramose, lobate, robust. Surface covered with 

 more or less prominent, rounded, often elongated monticules, the 

 summits and slopes of these occupied by cells larger than the 

 average. Calices sub-circular or ovate, rather regularly arranged 

 in intersecting series, sometimes surrounded by an elevated ri n of- 

 ten inflected at the points occupied by the minute spiniform coral- 

 lites. Interstitial cells present, but not seen readily externally. 



Obs. In general aspect this closely approaches raiiiosa, but is 

 separated from it by not having the numerous interstitial cells of 

 that form. 



Formation and Locality : Lower Silurian, Cincinnati Group, 

 Newport, Ky. 



33. M. OHiOENSis, U. P. James. 

 Jour. Cin. S. N. Hist., VII., 137, 1884. 



Corallum dendroid, stem and branches mostly cylindrical or 

 sub-cylindrical, sometimes flattened, sometimes tumid ; branches 

 irregular, generally dichotomous, varying in size from one and one- 

 half lines to six lines wide, sometimes one and one-quarter inches 

 across branches. Surface with numerous conspicuous elevated 

 monticules, arranged in alternate manner, one-half line in diameter 

 at base and about the same distance apart. Larger calices circular 

 or sub-polygonal ; the smaller round or angular, numerous. Walls 

 thickened at the mouths. 



