378 



The. most important points yet to be determined are the nature of the 

 base (whether composed of five pieces surrounding a central piece, 

 and whether or not it was connected with a column), the presence or 

 absence of subradial pieces, and whether there is an anal series of pieces 

 differing from each, of interradial series. : i 



That this Crinpid belongs to a new genus, however, there can scarcely 

 be any doubt. At least, even if agreeing with Marsupites in the nature 

 of its base, subradial pieces, and the absence of any column, it would 

 still differ very widely from that genus in the possession of interradial 

 and interaxillary pieces, as well as in the several divisions of its radial 

 series before becoming free, and the consequent greater number and 

 different arrangement of the pieces composing its entire body. 



Specimens flattened side wise, with the arms broken off above the 

 body, like that represented by Fig. B, at a first glance strike one as 

 being very similar to certain forms of the Palteozoic genus ForhesiQcrinus, 

 such, for instance, as F. Wortheni from the Carboniferous rocks. There 

 is no probabil,i!fcy,,hpweY,erj(.pf^.tlj,er§;,be^^^^ j^ny n^a5;;r§tatip?j:S) between 

 these types. -.;('■ ,>,,•-■.[ :....-.> or fM''>i-<'> iV'Vt'Hfi r vfffMihnT-' -r[■^v y'):! i ^ 



As this is the only Crinoid yet found in our Cretaceous rocks, and 

 presents some rather remarkable features, paheontologists . will await 

 with some interest the discovery of specimens in a CQnditipn. to show : 

 all of its structure. , -i , , 



Our specimens were sent by Profes.sor Mudge of Manhattan, Kans., 

 from the IsTiobrara group of the Upper Missouri Cretaceous series, in 

 Trigo County, Kansas; and I believe the, Kansas specimens figured by 

 •Mr. Grinnell came from tbe same place. They certainly came at least 

 from the same horizon. The specimen first discovered by Professor 

 Marsh in Utah, was found associated with Ostrea congesta, Conrad, a 

 species unknown from any other horizon than the Niobrara and Benton 

 groups ; thus showing, as might be expected from the invariably re • 

 stricted geological range of the species of the Crinoidea, that the speci- 

 mens at these twp -sfidelyrsepaijated lpqalitips,_, pficiipy, about; tli§;isame 

 geological horizom :..n,v.>o'i,,Mi|" 'lo '■/Hj^'i''M!'^'' ' ^'-vniM 7f!:lfh'-';r).!!:i: 







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