286 



ECHINODEKMATA. 



Sur. W. 100th. Meridian, Subcarbon- 



iferous. [Sig. disturbed.] 

 PoROCRiNUS crass us, is from the Hud. Riv. 



Gr., and P. pentagoiwis, from the 



Trenton Gr. 

 smithi, Grant, 1881, Trans. Ottawa Field 



Naturalists' Club, N'o. 2, Trenton Gr. 



[Ety. proper name.] 

 POTERiocKiNus anomalos, Wetherby, 1880, 



Jour. Cin. Soc. Nat. Hist., vol. 3, Kas- 



kaskia Group. [Sig. anomalous.] 

 arachnseformis, Worthen, 1882, Bull. 



No. 1, HI. St. Mus. Nat. Hist., Keo- 

 kuk Gr. [Sig. spider-like.] 

 asper, Worthen, 1882, Bull. No. 1, HI. 



St. Mus. Nat. Hist., Keokuk Gr. 



[Sig. rough.] 

 asperatus, Worthen, 1882, Bull. No. 1, 



111. St. Mus. Nat. Hist., Keokuk Gr. 



[Sig. made rough, uneven.] 

 briareus, -Worthen, 1882, Bull. No. 1, 



111., St. Mus. Nat. Hist., Keokuk Gr. 



[Ety. mythological name.] 

 burketi, Worthen, 1882, Bull. No. 1, 111., 



St. Mus. Nat. Hist., Keokuk Gr. [Ety. 



proper name.] 

 calyx. Hall, 1879, Desc. New Spec. Foss., 



Niagara Gr. [Sig. a cup.] 

 clarkei, Williams, 1882, Proc. Acad. 



Nat. Sci., Chemung Gr. [Ety. proper 



name.] 

 clay tonensis,. Worthen, 1882. Bull No. 1, 



111. St. Mus. Nat. Hist., Warsaw Gr. 



[Ety. proper name.] 

 clytis, Worthen, 1882, Bull. No. 1, 111. St. 



Mus. Nat. Hist., St. Louis Gr. [Ety. 



proper name.] 

 columbiensis, Worthen, 1882, Bull. No. 



1, 111. St. Mus. Nat. Hist., Kaskaskia 



Gr. [Ety. proper name.] 

 cornellanus, Williams, 1882, Proc. Acad. 



Nat. Sci., Chemung Gr. [Ety. proper 



name.] 

 coxanus, Worthen, 1882, Bull. No. 1, 



111. St. Mus. Nat. Hist., Keokuk Gr. 



[Ety. proper name.] 

 cylindricus was described in 1869 from 



the Up. Held. Gr. 

 davisanus, S. A. Miller, 1882, Jour. Cin. 



Soc. Nat. Hist., vol. 5, Up. Held. Gr. 



[Ety. proper name.] 

 fountainensis, Worthen, 1882, Bull. No. 



1, 111. St. Mus. Nat. Hist., St. Loui^ 



Gr. [Ety. proper name.] 

 gregarius, Williams, 1882, Proc. Acad. 



Nat. Sci., Chemung Gr. [Sig. gre- 

 garious.] 

 , hamiltouensis, Worthen, 1882, Bull. No. 



1, 111. St. Mus. Nat. Hist., Keokuk 



Gr. [Ety. proper name.] 

 hemisphericus, refer to Erisocrinws hem- 

 ispheric us 

 illinoisensis, Worthen, 1882, Bull. No. 1, 



111. St. Mus. Nat. Hist., Warsaw Gr. 



[Ety. proper name.] 

 iowensis, Worthen, 1882, Bull. No. 1, 



HI. St. Mus. Nat. Hist., Keokuk Gr. 



[Ety. proper name.] 



PoTERiocniNus jesupi, Whitfield, 1881, 



Bull. No. 1, Ann. Mus. Nat. Hist., 



Burlington Gr. [Ety. proper name.] 

 kaskaskensis, Worthen, 1882, Bull. No. 



1, 111. St. Mus. Nat. Hist., Kaskaskia 



Gr. [Ety. proper name.] 

 latidactylus. Worthen, 1882, Bull. No. 1, 



111. St. Mus. Nat. Hist., Keokuk Gr. 



[Sig. wide armed.] 

 milleri, Wetherby, 1880, Jour. Cin. Soc. 



Nat Hist., vol. 3, Kaskaskia Gr. 



[Ety. proper name.] 

 nauvooensis, Worthen, 1882, Bull. No. 1, 



111. St. Mus. Nat. Hist., Keokuk Gr. 



[Ety. proper name.] 

 occidentalis, Worthen, 1882, Bull. No. 1, 



111. St. Mus. Nat. Hist., Keokuk Gr. 



[Sig. western ] 

 okawensis, Worthen, 1882, Bull. No. 1, 



111. St. Mus. Nat. Hist.. Kaskaskia 



Gr. [Ety. proper name.] 

 Orestes, Worthen, 1882, Bull. No. 1, 



111. St. Mus. Nat. Hist., Keokuk Gr. 



[Ety. proper name.] 

 otterensis, Worthen, 1882, Bull. No. 1, 



111. St. Mus. Nat. Hist., Keokuk Gr. 



[Ety. proper name.] 

 peculiaris, Worthen, 1882, Bull. No. 1, 111. 



St. Mus. Nat. Hist., Kaskaskia Gr. 



[Sig. peculiar.] 

 penicilliformis, Worthen, 1882, Bull. No. 



1, 111. St. Mus. Nat. Hist., Keokuk 



Gr. [Sig. like a painter's brush,] 

 pisiformis, refer to Arachnocrinus pisi- 



formis. 

 popensis, Worthen, 1882, Bull. No. 1, 



111. St. Mus. Nat. Hist., Kaskaskia 



Gr. [Ety. proper name.] 

 posticus, refer to Dendrocrinus posticus, 

 propinquus, Worthen, 1882, Bull. No. 1, 



111. St. Mus. Nat. Hist., Kaskaskia 



Gr. [Sig. near to.] 

 rhombiferus, refer to Barycrinus rhombi- 



ferus. 

 richfieldensis, Worthen, 1882, Bull. No. 



1, 111. St. Mus. Nat. Hist., Kinder- 

 hook Gr. [Ety. proper name.] 

 salteri, Worthen, 1882, Bull. No. 1, 111. 



St. Mus. Nat. Hist., Kaskaskia Gr. 



[Ety. proper name.] 

 sculptus, Worthen, 1882, Bull. No. 1, 



111. St. Mus. Nat. Hist., Kaskaskia 



Gr. [Sig. sculptured.] 

 similis, Worthen, 1882, Bull. No. 1, 111. 



St. Mus. Nat. Hist., Keokuk Gr. [Sig. 



similar.] 

 simplex was described in 1869 from the 



Up. Held. Gr. 

 spinobrachiatus, Worthen, 1882, Bull. 



No. 1, 111. St. Mus. Nat. Hist., 



Kaskaskia Gr. [Sig. spine armed.] 

 subramulosus, Worthen, 1882, Bull. No. 



1. 111. St. Mus. Nat. Hist., Keokuk 



Gr. [Sig. somewhat full of branches.] 

 talboti, Worthen, 1882, Bull. No. 1, 111. St. 



Mus. Nat. Hist., St. Louis Gr. [Ety. 



proper name.] 

 tentaculatus, Worthen, 1882, Bull. No. 1, 



