36 University Geological Survey of Kansas. 



spines are much longer, the infrabasals not hidden by the col- 

 umn, and that the cup is perhaps a little shallower, as is also 

 the concavity of the base. 



If Meek's determination of C. hemisphericus is correct, it does 

 not have the costals developed into spines at all, and hence it 

 is distinct from the spined forms. The minute differences be- 

 tween the two spined forms, as figured by Miller and Gurley, are 

 of little value. 



PHIALOCEJNUS. 



Trautscliold, Mod. Kalkbrueche von Mjatschkowa, p. 122, (1879). 



Phialocrinus magnificus. Plate VI, fig. 10. 



JEsiocrinus magnificus Miller and Gurley, Jour. Cine. Soc. Nat. Hist., 



xin, p. 15, pi. ii, *f. 1, (1890). 

 Phialocrinus magnificus Carpenter, Ann. and Mag. Nat. Hist., p. 96 T 



(1891); Keyes, Geol. Surv. Mo., iv, p. 220, pi. xxvin, f. 4, (1894). 



Calyx bowl-shaped, base truncated, of medium size, surface 

 finely granulated. Infrabasals five, cuneiform, pentagonal, 

 half covered by the column, stem facet radiately furrowed. 

 Basals five, hexagonal, posterior one heptagonal ; the two sides 

 at the base rather indistinct, edges straight ; plates convex, 

 curving inward at the base to meet the infrabasals, very 

 slightly wider than high. Radials convex, nearly equal, the 

 right and left posterior ones occasionally a trifle smaller than 

 the rest, pentagonal, width about one and one-half times the 

 height, upper outer edges beveled. Interradial resting on the 

 truncated upper surface of the posterior basal, large, pentago- 

 nal, within the calyx, wider above, greatest width equal to 

 the height, supporting two anals. First brachials large, quad- 

 rangular, the lower outer edge beveled. The second brachials 

 pentagonal, highest in the center, superior side faceted for the 

 support of the two arms, about twice as broad as high 

 Arms ten, slender, often 100 mm. long, pinnulate, pinnulse 

 often 10 mm. long. The arms are composed of a single series 

 of slightly cuneate plates, the inner side of which is fur- 

 nished with a deep, broad groove. Above the interradial rest 

 at least two anal plates which curve moderately inward. The 

 proboscis is long, rather slender, subquadrate in transverse out- 

 line ; in adult specimens, between the lobes of the tube, are 



