KENTUCKY GEOLOGICAL SURVEY. 51 



Occurrence: Common in the Eden formation in Ohio and 

 Kentucky. 



4. From the Mount Hope Beds. 



HETEKOTRYPA SUBPULCHELLA ( NICHOLSON ) . 



Chsetetes subpulchellus. Nicholson, Paleontology of Ohio, vol. 2, p. 196, pi. 



xxi, 6, Ga, 1875. 

 Monticuiipora (Heterotryra) subpulchella. Nicholson, Genus Monticulipora, 



p. 134, fig. 23 and pi. v. 2, 2a : 1381. 



Zoarium of rather narrow, branching fronds, from 2 or 3 to 

 5 or 6 mm. thick, and 50 or more mm. in height. Surface smooth. 

 Apertures circular or subpolygonal, 8 or 9 in 2 mm., with many 

 mesopores interspersed, the latter also clustered into somewhat 

 stellate groups or macula*, about 2 mm. apart. In the axial re- 

 gion the zorecia are thin-walled, and with comparatively few 

 diaphragms; in the mature region, the walls are thickened, the 

 diaphragms numerous, and medium-sized acanthopores develop- 

 ed in considerable numbers. Mesopores with closely set diar 

 phragms. 



Occurrence: Very abundant and one of the characteristic 

 forms, in the Mount Hope beds of the Maysville group. Found 

 at Covington and Newport, Ky., Cincinnati, Ohio, and Mays- 

 ville, Ky. 



BATOSTOMA MAYSVILLE^SIS N. SP. 



Plate 2, figs. 13, 14. 



Zoarium irregularly ramose, branching variably. Branches 

 cylindrical, or sometimes compressed, 3 to 10 mm. in diameter. 

 Surface smooth, with clusters of apertures slightly larger than 

 the average, sometimes rising a little above the general level. 

 Apertures aubangular or subcircular, with sometimes rather 

 thin, at other times somewhat thickened, interspaces, about 6 

 in 2 mm. Mesopores wanting cr almost so. Xo acanthopores 

 were detected either on the surface or in sections. Their absence 

 may be due to the state of preservation of the material examined ; 

 better material may show them to have been present. Zocecia 



