INDIANA PALEONTOLOGY. 91. 



even more poorly preserved specimen of woodmani. The propriety of sepa- 

 rating Trlc<xlocrinus hipyramidalis and wortheni from y:oodmani and 

 placing them in another genus is not apparent to the writer. 



Metahlastus may be a good genus and include lineatus and such very 

 elongate forms, but the distinctive characters of Tricmlocrinus are possessed 

 by worthen'i and hipyramidalis.. 



From an examination of a large series of these last mentioned species from 

 Boonville, Mo., the writer is inclined to doubt that specific ditferences exist 

 between loortheni and hipyramid'aUs, a complete series of intermediate 

 forms, making it quite impossible to define the limits of the two species. 

 However, forms that the writer takes to be hipyramidalis occur in the War- 

 saw beds of Indiana, associated with n'oodmaai while no typical u'ortheni 

 has yet been brought to his notice from that particular section. 



The figured specimens of T. icoodmanii were collected from the Warsaw 

 beds, two miles west of Bridgeport, Harrison county, Ind., and are now in the 

 G. K. Greene collection. 



TALAROCRINUS SIMPLEX, Shumard, Rowley. 



Plate 29. Figs. 24, 25, 26-27. 



Figure 24 shows a specimen with an extra plate between one of the radials 

 and the basal plate below it, and encroaching on two other radials at their 

 lower angles. This plate is pentagonal and wider than long. 



Another specimen of this same spesies, figures 25, 26, has an extra plate 

 in the anal area, below the usual anal plate, and cutting off the lower radial to 

 the light. This is rather a small quadrangular plate, wider than long. The 

 same specimen, figure 26, has a large extra quadrangular plate between a ra- 

 dial and a basal plate. 



These two abnormal specimens are from Lanesville, Ind., Warsaw group, 

 and the normal specimen, figure 27, from the Keokuk Limestone of Edwards- 

 ville, Ind. All belong to the G. K. Greene collection. 



ELEUTHEROCRINUSCASSEDAYf, Shumard & Yandell, Rowley. 



Plate 30. Figs. 1, 2, 3-4. 



This very peculiar blastoid, viewed from its anterior side, bears a striking 

 resemblance to the associated species of Pentremitidea, but there the likeness 

 ends. 



The abbreviated fifth ambulacrum, the short and broad posterior radial, 

 and the narrow, elongate bases upon which the latter plate rests, widely sepa- 



