Plat. 



688 



ray; also nodose calyx. From Waverly 5A(^Zet9, Summit Co., 

 O.— X 

 Platycrinus hemisphericus, Meek & Worthen, 1865, Proc, 



XL 



ndlJS&l. 



A. N. S. Phila. Collett's Indiana Report of 1881, page 368, 

 plate 41, fig. 1. Keyes. Amer. Philos. Soc. Phila. Vol. 25, No. 



128, p. 242, fig. 1, 

 growing on a Plat- 

 yceras infundibul- 

 um; fig. 2, grow- 

 ing on Platyceras 

 .cvveo- 'i/-^9xxv ^^^^ equilaterum, Suh- 

 carooniferous^ Keolcuk limestone. — 



Platycrinus lodensis, H. & W. Pal. Ohio, Vol. 2, 1875, p. 



V .■■■;is:ss'sgate:.^ *K loo, pi. 11, 



fig. 3, with 

 stron g arm 

 bases; basal 

 plates slight- 

 jl ly restored by 

 the drafts- 



FaJ.Ohio 



Vci^ITr F/'^^ ' '-^^ man; appar 



ently smooth, or delicately granulose. Belongs to the group 

 P, wortheni^ P. shumardiana. etc., but is specifically difterent 

 in absence of cup ornamentation, greater height, and arm 

 arangement. Cuyahoga limeshales ( Waverly)^ Medina Co. 

 O. — Pocono foTmation^ X. 



Platycrinus planus. Owen & Shumard, Geol. Wisconsin, 

 etc., 1852, pi. 5A, fig. 4 a, specimen of medium size; J, large 

 specimen from Burlington limestone^ Iowa ; c detached plate 

 at the base, where the cup joins the stem. XI, [Fig. on 689,) 



