NO. 1850. KNOB STONE CRINOID FAUNA— SPRINGER. 197 



has only a few scattered tubercles, though some specimens have them 

 considerably like tliis. 



Locality. — Button-mould, and other Knobs in the vicinity, and in 

 Marion County, Kentucky; Palmer's and Stone's farms, Clark 

 County, Indiana ; Whites Creek, Tennessee. From the latter I have 

 a very large calyx, supplementing a good reconstructed calyx from 

 the other locahties. 



3. Elongate, medium size, with high BB apparently much larger than 

 RR, which have deep, narrow facets, not projecting and directed out- 

 ward; IBB not found, but probably high, as in the last species. Sur- 

 face very strongly ornamented with sharp, elevated ridges and narrow 

 furrows radiating from the facets and passing three or more parallel 

 to centers of BB, thence to centers of adjoining BB, and down to the 

 IBB. It is superficially similar to species 2, but distinct in form of 

 radial facets and regular arrangement of ornament into ridges; the 

 isolated plates of the two can be separated with certainty at a glance. 

 There is no other American species with which it can be compared; 

 C. lamellosus Wliite, from the Upper Burlington, faintly resembles it 

 in its few sharp ridges, but it is short and of a very different type. 

 But it will need very close comparison with a species described by 

 Austin ^ and erroneously referred to C '. geometricus Goldf uss ; it is 

 said in the text to be from South Devon, but I suspect it is Lower 

 Carboniferous. 



Locality. — Button-mould and Bradbury Knobs, Kentucky; and 

 Stone's farm, Clark County, Indiana. 



4. Elongate, medium size; a delicate species \\dth tliin plates. 

 BB elongate, RR large, probably larger than BB, \\4tli deep facets 

 not projecting and directed outward; IBB not found. Surface 

 thickly studded with very small granules tending to become confluent 

 and form fine Hues at right angles to the sutures ; and a very pronii- 

 nent five or six pointed star in the center of BB, composed of strongly 

 elevated sharp ridges running nearly to the edge of the plates, where 

 they tliin to fine points and do not pass to adjoining plates; similar 

 ridges radiate from the radial facets, but not reaching the sutures. 

 There is nothing to compare tliis Avith, save the last species, of winch 

 it may be a modification; but we can never mistake a plate of one for 

 the other on account of the fine, granular surface outside of the 

 ridges in tliis, whereas in the last the intervening surface is perfectly 

 smooth. We have a reconstructed calyx minus the IBB. 



Locality. — Button-mould and Jacob's Knobs, Kentucky; and 

 Palmers, Clark County, Indiana. 



5. Rather broadly rotund, medium size; with low IBB; large BB, 

 as wide as long, much larger than RR and not protuberant ; RR short 

 and wide, facets rather large and not projecting, facing obliquely 



> Monog. Ree. and Foss. Grin., p. 61, pi. 7, figs. 5a-e. 



