Pasceolus Danclni. 



but good specimens sliow u round periphery, without change in the 

 uniformity of the depressions. 



It is sometimes found partly incrusted with a bryozoum, but it is 

 generally clean, showing clearly the depressions, even in specimens 

 very much compres>ed. 



The incrusting bryozoum also shows pentagonal depressions, Avhich 

 clearly proves that the pentagonal depressions in the Pasceolus were 

 filled with plates that were a little convex on the outer surface. Some 



Fitr. 1. P. TJniiviiii under surfacG. 



Fig. 2. P. Darwini upper surface. 



[These figures are not shaded .so as to show the depressions, and the specimens are marked 

 Euich more regulariy pentagonal than the figures.] 



specimens show convex pentagonal elevations, but the material in the 

 convex elevations does not appear to be different from other parts of the 

 surface, no part of which shows any cellular structure. The pentagonal 

 concave depressions in the bryozoum appear perfectly smooth, thereby 

 indicating that the plates of the Pasceolus were smooth. 



One specimen has a perforation about forty-five degrees from what 

 appears to be the apex, but whether it marks an opening to the 

 interior or not I am unable to say. If it does, however, it would seem 

 strange that out of fifty other specimens, nearly as good, none of them 

 show anything of it. I broke one specimen into two parts, and polished 

 the surfaces, but discovered no cellular structure. 



Fragments and poor specimens are rare on the hills back of Cincin- 

 nati, at an elevation of about 400 feet above low water-mark. I found 

 good specimens about two miles soutji of Maysville, Kentucky, in a 

 railroad cut, that came out of a layer of marl, al)out two feet in thick- 

 ness, between the harder stratified rocks. In the same excavation I 

 found Glyptocr'uius deeadadijlus, Ortliis sinuata, SteUipora cuithcioidea, 

 large Orthis lynx, and other fossils that are found at Cincinnati, from 

 350 to 450 feet above low water-mark. 



Pasceolus ClaudeL — (S. A. Miller.) 



Body spherical, witliout any depression where the column or pedicle 

 was attached. Entire surface marked by closely crowded i^entagonal 



