ECHINODERMATA. 



87 



elegans, Hall, 1861, Desc. New Orinoidea, 



Burlington, Gr. [Sig. elegant.] 

 eminulus, Hall, 1861, Desc. New Orinoi- 

 dea, Burlington Gr. [Sig. projecting 

 a little.] 

 eriensis. Hall, 1862, 15tli Reg. Rep. N. 



Y., Ham. Gr. [Ety. proper name.] 

 excavatus, Hall, 1861, Desc. New Orinoi- 

 dea, Burlington Gr. [Sig. hollowed 

 out.] 

 exsertus. Hall, 1858, Geo. Rep. Iowa, 

 Burlington Gr. [Sig. projecting, thrust 

 forth.] 

 georgii. Hall, 1860, Supp. to Iowa Geo. 

 Rep., Warsaw, Gr. [Ety. proper 

 name.] 

 glyptus. Hall, 1861, Desc. New Orinoidea, 



Burlington, Gr. [Sig. sculptured.] 

 graphicus. Hall, 1863, Grin. Wav. Sands. 



Ohio, Waverly Gr. [Sig. written on.] 

 halli, Shumard, " 1866, Trans. St. Louis 



Acad. Sci., vol. 2, Burlington Gr. 



[Ety. proper name.] 

 haydeni. Meek, 1872, Hayden's Geo. Rep., 



Low. Oarb. [Ety. proper name.] 

 hemisphericus. Meek & Worthen, .1865, 



Proc. Acad. Nat. Sci., Phil., Keokuk 



Gr. [Sig. hemispherical.] 

 huntsvillx, Troost. Not defined, 

 incomptus. White, 1863, Jour. Bost. Soc. 



Nat. Hist., vol. 7, Burlington Gr. [Sig. 



unadorned.] 

 inornatics, syn. for P. burlingtonensis. 

 inscidptus, Troost. Not defined, 

 leai, Lyon, 1860, Trans. Am. Phil. Soc, 



Low. Held. Gr. [Ety. proper name.] 

 lodensis. Hall & Whitfield, 1875, Ohio 



Pal., vol. 2, Waverly Gr. [Ety. proper 



name.] 

 montanaensis. Meek, 1871, Hayden's Geo. 



Rep. Low. Oarb. [Ety. proper name.] 

 multibrachiatus. Meek & Worthen, 1861, 



Proc. Acad. Nat. Sci. Phil., Warsaw 



Gr. [Sig. many-armed.] 

 niotensis, Meek & Worthen, 1865, Procv 



Acad. Nat. Sci. Phil., Keokuk Gr. 



[Ety. proper name.] 

 nodobrachiatus, Hall, 1858, Geo. Rep. 



Iowa, BurHngton Gr. [Sig. having 



knotty arms.] 

 nodulosus. Hall, 1858, Geo. Rep. Iowa, 



Burlington Gr. [Sig. covered with 



small knots.] 

 nucleiformis. Hall, 1858, Geo. Rep. 



Iowa, Burlington Gr. [Sig. in the 



shape of a kernel.] 

 oUa, Hall, 1861, Desc. New Orinoidea, 



but the name was preoccupied and 



Shumard proposed for the species, P. 



halli. 

 ornogranulus, McChesney, Syn. for P. 



americanus. 

 oweni. Meek & Worthen, 1861, Proc. 



Acad. Nat. Sci., Phil., Burlington Gr. 



[Ety. proper name.] 

 papillatus. Hall, 1861, Desc. New Orinoi- 

 dea, Burlington Gr. [Sig. shaped like 



a bud.] 



parvinodus. Hall, 1861, Desc. New Orin- 

 oidea, Burlington Gr. [Sig. having 

 small knots.] 

 parvulus, Meek & Worthen, 1865, Proc. 

 Acad. Nat. Sci. Phil., Chester Gr. 



[Sig. very small.] 

 parvus. Hall, 1859, Pal. N. Y., vol. 3, 



Low. Held. Gr. [Sig. small.] 

 penicillus. Meek & Worthen, 1860, Proc. 



Acad. Nat. Sci. Phil., St. Louis Gr. 



[Sig. a small brush.] 

 perasper. Meek & Worthen, 1865, Proc. 



Acad. Nat. Sci. Phil., Burlington Gr. 



[Sig. very rough.] 

 pileiformis,"Hall, 1858, Geo. Rep. Iowa, 



vol. 1, pt. 2, Burlington Gr. [Sig. like 



a small cap.] 

 planus, Owen & Shumard, 1850, Jour. 



Acad. Nat. Sci. Phil., 2d ser., vol. 2, 



Burlington Gr. [Sig. plain, level.] 

 plenus, Meek & Worthen, 1860, Proc. 



Acad. Nat. Sci., Phil., St. Louis Gr. 



[Sig. full, large.] 

 pleurovimineus, White, 1862, Proc. Bost. 



Soc. Nat. Hist., vol. 9, Burlington Gr. 



[Ety. pleuron, the side; viminetts, made 



of wicker work.] 

 plumosus. Hall, 18.59, Pal. N. Y., vol. 3, 



Low. Held. Gr. [Sig. feathery.] 

 pocilliformis. Hall, 1858, Geo. Reji. Iowa, 



vol. 1, pt. 2, Burlington Gr. [Sig. like 



a little cup.] 

 IMlydactylm, Troost. Not defined, 

 prsematurus, Hall & Whitfield, 1875, Ohio 



Pal., vol. 2, Niagara Gr. [Sig. prsema- 



ture.] 

 prattenianus. Meek &Worthen, Sept. 1860, 



Proc. Acad. Nat. Sci., Phil., St. Louis 



Gr. [Ety. proper name.] 

 puniilis. Hall, 1860, Supp. to Geo. Iowa, 



Warsaw Gr. [Sig. a dwarf.] 

 quinquenodus. White, 1862, Proc. Bost. 



Soc. Nat. Hist., vol. 9, Burlington Gr. 



[Sig. five-noded.] 

 ramulosus, Hall, 1859, Pal. N. Y., vol. 3, 



Low. Held. Gr. [Sig. full of branches.] 

 regalis. Hall, 1861, Desc. New Orinoidea, 



Burlington Gr. [Sig. royal, splendid.] 

 richfieldensis. Hall & Whitfield, 1875, 



Ohio Pal., vol. 2, Waverly Gr. [Ety. 



proper name.] 

 safi'ordi, Troost, 1850, Hall, 1858, Geo. Rep. 



Iowa, Keokuk Gr. [Ety. proper name.] 

 sarte, Hall, 1858, Geo. Rep. Iowa, St. 



Louis Gr. [Ety. proper name.] 

 scobina. Meek & Worthen, 1861, Proc. 



Acad. Nat. Sci., Phil., Burlington Gr. 



[Sig. a rasp.] 

 sculptus. Hall, 1858, Geo. Rep. Iowa, 



Burlington Gr. [Sig. engraved.] 

 shumardianus, H^ll, 1858, Geo. Rep. 



Iowa, vol. 1, pt. 2, Burlington Gr. 



[Ety. proper name.] 

 striobrachiatus. Hall, 1861, Desc. New 



Orinoidea, Burlington Gr. [Sig. hav- 

 ing striated arms.] 



