The Paleontologist. [July 2, 



Chaetetes. Sp. (?) a coral resembling Chaetetes Janiesi, Nicholson, is found in the 

 upper beds of the Cincinnati Group. Its mode of growth seems to differ in some respects ; 

 being spread over shells, in thin lays, in some cases; in others branching out in a digitate 

 manner from lobate, palmate and irregular shaped forms ; the average calices are scarcely 

 as thick walled as typical yizwcj?', and the stellate spaces rather more conspicuous. Should 

 it prove a distinct species, I propose for it the name variaus (Chaetetes varians. ) 



The typical C. Jamesi is found in the lower beds of the Group at Cincinnati. 



GENUS HELIOLITES, (Guettard.) 



Heliolites Shepardi. (James.) Corallum sub-circular in outline at the base; dis- 

 coid, or hemispherical, or dome shaped, or lozenge shaped ; from ^ an inch to about an 

 inch in diameter at the base. Cells on the upper surface from y^ a line to one line in 

 diameter, in most cases two or more times their diameter apart, but sometimes not more 

 than I line ; margins of cells thin, very little or not at all elevated above the general sur- 

 face ; the cups show 12 well developed septa; coenenchyma thickly set with irregularly 

 shaped pit-like markings, giving to it a roughened aspect. Vertical thickness, through 

 the center, from less than ^ of an inch to ^ an inch in different examples. Base (under 

 side) markings are shown in sort of radiating lines from the center. A vertical section of 

 one specimen shows the cells passing through the body of the fossil, but the internal struc- 

 ture cannot be clearly made out from the material at hand. 



The base, (under side) of the 4 examples I have, vary widely- — 2 being flat with a 

 saucer-shaped depression in the middle, about 2 lines in diameter, surrounded by an ele- 

 vated rim, outside of which (in one case) are 4 concentric lines of growth, (?) slightly 

 elevated— the other has but one raised line, rather more prominent, between the rim and 

 margin. The third example has a raised center, slightly depressed in the middle, 2 lines 

 in diameter, with a single broad circular groove between that and the margin. The 

 fourth is more convex on the under than the upper side, with 6 concentric lines of growth, 

 and a central prominence about l^ lines in diameter, and a groove about ^ of a line 

 deep and y, a line broad, extending from the center to within a line of the margin on one 

 side, where the fossil is thickened downwards and a slight depression opposite on the 

 upper side ; this is a lozenge-shaped specimen. The base difference may have been caused 

 by the shape of the substances on which they appear to have grown — the upper surfaces 

 are much alike. 



Named in honor of Mr. Carlos Shepard, collector of the specimens. 



Locality — Adams County, Ohio, upper part of Cincinnati Group. 



GENUS PISTULIPORA, (McCoy.). 



Fistulipora (?) multipora. (James.) Corallum incrusting foreign substances, 

 generally other corals, entirely covering cylindrical and flattened branches, sometimes in 

 superimjiosed layers; others spread over the surface of shells. The cells are of various 

 irregular shapes— circular, oval, triangular and other forms — about J/^ of a line in diame- 

 ter. Between and sometimes surrounding the larger cells are numerous small pores, in 

 some cases double rows, with no apparent regularity of arrangement. Occasionally, on 

 some specimens, there are groups of the small pores occupying the places of the larger 

 cells. 



Locality — Cincinnati and vicinity, with a vertical range of 400 or 500 feet. 



GENUS AGELACRINUS, (Vanuxem.) 



AgelaerinuS Holbrooki. (James.) Body circular, sub-globose. Disc composed of 

 many thin plates, those in the interradial areas pentagontil or hexagonal, outside squami- 

 form, imbricating ; margin of the disc composed of numerous small cuniform and various 

 shaped plates. Arms or rays not raised above the surface of the disc, four sinistral and 

 one dextral, composed of two rows of interlocking pieces; ends of the rays curving quite 

 sharply upward and inward, making nearly a semi-circle, to near the center of the inter- 

 radial areas, and terminating in a blunt club-shaped form. Ovarian aperture situated 

 subcentrally in the area between the dextra! and one of the sinistral rays, depressed and 

 composed of ten cuniform pieces and an outer row of small thin plates, placed, apparently, 

 on their edges. The end of the dextral ray passes into or against the plates of the ova- 

 rian aperture. 



Diameter at the base i^ inches, and measuring from side to side, over the crown, 1 3^ 

 inches; convexity ^ of an inch. 



