1 62 Cincinnati Society of Natural History. 



Obs. This species was first briefly described and named 

 provisionally by one of us in Sept., 1878, in The Palceontologist 

 under the name of Chcetetes turbinatuvi (as above.) Mr. Ulrich's 

 WdSi\^oi subglobosa was printed in Oct., 1879. A note made and 

 put with some specimens at the time of publication of this name 

 was to the following effect: "Mr. Ulrich described and figured 

 this species in Jour. Cin. Soc. Nat. Hist, for Oct., 1879, issued Feb. 

 13, 1880, under the name of C/icefetes subglobosus. He was aware 

 of my published description and name a year or more before his 

 was in print. He talked with me about it. U. P. J." Under 

 these circumstances we think it justifiable to claim priority for 

 turbinata. The species varies in shape from pear-form to nearly 

 globular, and can be readily recognized by its form and its smooth 

 surface. 



Formation and Locality. Lower Silurian Cincinnati Gr., Cin- 

 cinnati, Batavia, C, and Covington, Ky. 



3. M. FiLiASA, D'Orb. 1850. 



Prodrome de Paleont., p. 25. 



Chcetetes filiasa, Edw. and Haime. Poly piers Fossiles des Ter- 

 rains Palaeozoiques, p. 266, 185 1. Nicholson, Palccontology of 

 Ohio, Vol. n., 206, 1875. 



Monotrypa filiasa, D'Orb. Ulrich. J. C. S. N. H., W., 163, 

 1883 (with a (|uery). 



Corallum forming irregular masses, attached at the base to 

 foreign object. Surface more or less convex, covered with more 

 or less prominent, rounded monticules ; corallites thin-walled, 

 sub-equal. No interstitial cells. 



Obs. This is an illy defined form. The only description to 

 which we have access is that given in the Ohio Palaeontology as 

 above. It is often quite large, entirely covering the shells of species 

 of Ambonychia. One of us has a specimen four and one-half inches 

 across the longer diameter, the coral extending an inch or more be- 

 yond the edge of the shell, and showing the corallites at places on 

 the underside. The upper surface has numerous elevations which 

 are possibly the beginnings of branches. Still another specimen is 

 about two and one-half inches high and about the same in diameter. 

 This is also attached to the shell of an Ambonychia. 



Formation and Locality. Lower Silurian, Cincinnati Gr. , 

 Cincinnati, Ohio, and other points in Cin. Gr. 



