INDIANA PALEONTOLOGY. lu. 



The body is broadest near the rej;ion of the seeoiid interradials and sli<;hlly 

 contracted below the arm bases. 



One radial ray has four plates iji the first series. 



There are four slits between the arm lobes and two between iniUvidiial 

 arms. The arm formula is 3, 4, 3, 4, 8, or 17 in all. 



The anal tube is nearl}' central but not stronj;!;. 



The plates of the ventral sitle are nearly flat. <^rooved at the suture^ and 

 ornamented with low, granular like nodes. 



Compare with /). ((/np/t/s-, 31. <fe G., a twenty armed species. 



From the Upper Devonian (Hamilt«»n group) near < 'harlestown, Ind. ( nl- 

 lection of Mr. G. K. (rreene. 



( : A L C K O (■ R I N r S G K A X L' L I F K R U S , N . Sp. ( Rowley. ) 



Platk 85. Fk.s. 7, 8, 9. 



Body subiiuadrate, broadest below. The basal plate seems to l>e made up 

 of three anchylosed pieces, the whole triangular and more than twice as wide as 

 long, grooved along the entire upper edge. Sear for attachment of column 

 hardly round, excavated. 



Lower dorsal plate broadly triangular, more than twice as broad as long 

 and deeply grooved along its lower edge. Upper dorsal plate triangular, tliree 

 times as broad as long and grooved along the front of the upper edge. 



The dorso lateral plates are longer than wide, and constricted a litt'.e at 

 the middle of the outer edge. 



All of the plates are somewhat convex and depressed, almost grooved, 

 along the sutures. 



Surface ornamentation granular. 



Arms and column unknown, 



Knobstone group, Button Knobs, near Louisville, Ky. Collection of >[r, 

 G. K. Greene. 



Our species belongs to the division of Calceoerinus, called Deltacrinus by 

 Mr. E. O. Ulrich, and should this latter name hold in a full generic sense, our 

 species would become Deltticr'nDiH gfaniiliU'i'iix. 



P L A T Y C R I N U S 1) E V O N I C U S , N. Sp., (Rowley) . 



Plate 85. Figs. 10, IL 

 The base onh/ oi this fossil is known, but its characters are quite markad 



