INDIANA PALEONTOLOGY. J32. 



The plates of the next ring above are still more sharply convex and hardly 

 less rough. The succeeding rows of plates are more tuburcular and strongly 

 defined. 



The plates of the ventral disk are small, convex and somewhat rugose with 

 irregular distributed larger spinose plates. There are sixteen arm bases. 



The specimen, represented by figures 3 and 4, has a more convex base and 

 the basal, first radial and the greater part of the next ring of plates are flat and 

 granular. The next ring of plates, however, are very convex and strongly ru- 

 gose. All other dorsal plates are quite nodose, almost spinose. The plates of 

 the ventral disk are nodose and rugose, but there are apparently no strong spi- 

 nose plates as in the preceding specimen. The concentric or irregular arrange- 

 ment of the granular ornamentation of the basal region of these fossils is of no 

 consequence and the confinement of it to the basal and first radials or the invas- 

 ion of the second radials aad first interr«idials is of no significance whatever be- 

 yond growth or development. 



Figure 5 represents a form where-ia the basals, first radials, and three of 

 the first interradials (save a single strong node) and portions of several second 

 radials are ornamented by irregular granular lines. The plates above are con- 

 vex and crossed by strong radiating ridges. The plate ornamentation on this 

 specimen is very strong and the basal region (basal plates, first radials and 

 part of the second radials) is concave, but not deeply so. 



Specimen figure 6 is quite concave in the basal region and the granulo- 

 linear ornamentation of the flat basals, first radials and parts of the next ring 

 of plates a"bove is concentric in arrangement. The rest of the dorsal plates are 

 convex and with very strong radiate ridges or strongly nodose, as the smaller 

 upper plates. 



Figure 11 is a smaller and younger individual in which the ornamentation 

 of the basals, first radials and parts of the ring of plates above appears to be 

 numerous intersecting granular ridges giving the surface a pitted appearance. 

 The center of each of these plates is a low, indistinct elevation. The rest of 

 the dorsal plates are strongly nodose, the third radials, however, being invaded 

 by illy defined radiating ridges. 



All these specimens come from the Upper Devonian beds at the Falls of the 

 Ohio and are the property of Mr. G. K. Greene, of New Albany, Ind. 



DOLATOCRINUS ARROSUS? M.&G., Rowley. 



Plate 38. Figs. 9, 10. 



The body of this little crinoid is basket shaped with a flat basal region, 

 strong nodes on the first, second and third radial plates and the first interradial : 



