ECHINODERMATA. 



77 



DicTYOCRiNus, Conrad, 1841, (Dictuocrinites) 

 Ann. Rep. N. Y. [Ety. dictyon, a net ; 

 krinon, a lily.] 



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



Low. Held. Gr. [Sig. scale-bearing.] 



DoLATOCRiNus, Lyon, 1857, Geo. Sur. Ky., 



vol. 3. [Ety. dolatus, hewn or tooled ; 



krinon, a lily.] 



glyptus, Hall, 1862, (Cacabocrinus glyp- 

 tus) 15th Reg. Rep., Ham. Gr. [Sig. 

 sculptured.] 



glyptus var. intermedins. Hall, 1862, 15th 

 ' Reg. Rep. N. Y., Ham. Gr. [Sig. in- 

 termediate.] 



lacus, Lyon, 1857, Geo. Sur. Ky., vol. 3, 

 Corniferous Gr. [Sig. a tub, a vat, a 

 basin.] 



lamellosus, Hall, 1862, (Cacabocrinus 

 lamellosus) 15th Reg. Rep. N. Y., Up. 

 Held. Gr. [Sig. in very thin plates.] 



liratus. Hall, 1862, (Cacabocrinus liratus) 

 15th Reg. Rep. N. Y., Ham. Gr. [Sig. 

 furrowed.] 



liratus var. multilira, Hall, 1862, Cacabo- 

 crinus liratus var. multilira) 13th Reg. 

 Rep. N. Y., Ham. Gr. [Sig. many- 

 furrowed.] 



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

 Devonian. [Ety. proper name.] 



speciosus, Hall, 1862, (Cacabocrinus speci- 

 osus) 15th Reg. Rep. N. Y., Up. Held. 

 Gr. [Sig. beautiful.] 



troosti. Hall, 1862, (Cacabocrinus troosti) 

 15th Reg. Rep. N. Y., Ham. Gr. [Ety. 

 proper name.] 

 Donacicrinites, Troost. Not defined. 



simplex, Troost. Not defined. 

 DoRYCRiNUS, Roemer, 1853, Wiegm. Arch. 

 [Ety. dory, a spear ; krinon, a lily.] 



canaliculatus, Meek & Worthen, 1869, 

 Proc. Acad. Nat. Sci., Burlington Gr. 

 [Sig. channeled.] 



cornigerus, Hall, 1858, (Actinocrinus cor- 

 nigerus) Geo. Rep. Iowa, Burlington 

 Gr. [Sig. horned.] 



desideratus. Hall, 1861, (Actinocrinus de- 

 sideratus) Desc. New Crinoidea, Bur- 

 lington Gr. [Sig. wished for, desir- 

 able.] 



divaricatus, Hall, 1860, (Actinocrinus di- 

 varicatus) Supp. to Geo. Sur. Iowa, 

 Burlington Gr. [Sig. wide apart.] 



gouldi. Hall, 1858, (Actinocrinus gouldi) 

 Geo. Rep. Iowa, Keokuk Gr. [Ety. 

 proper name.] 



kelloggi, Worthen, 1875, Geo. Sur. 111., 

 vol. 6, Keokuk Gr. [Ety. proper 

 name.] 



mississippiensis, Roemer, 1853, Archiv. 

 fur Nat., Jahr. 19, Keokuk Gr. [Ety. 

 proper name.] 



mississippiensis var. spiniger. Hall, 1860, 

 Supp. to Geo. Sur. Iowa, Keokuk Gr. 

 [Sig. spiny.] 



missouriensis, Shumard, 1858, (Actino- 

 crinus missouriensis) Geo. Rep. Mo., 

 Burlington Gr. [Ety. proper name.] 



quinquelobus. Hall, 1860 (Actinocrinus 

 quinquelobus) Supp. to Geo. Rep. 

 Iowa, Burlington Gr. [Sig. five- 

 lobed.] 



quinquelobus var. intermedius. Meek & 

 Worthen, 1868, Proc. Acad. Nat. Sci., 

 Burlington Gr. [Sig. intermediate.] 



roemeri, Meek ik Worthen, 1868, Proc. 

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

 [Ety. proper name.] 



subaculeatus. Hall, 1858, (Actinocrinus 

 subaculeatus) Geo. Rep. Iowa, Bur- 

 lington Gr. [Sig. armed with points 

 somewhat sharp.] 



subturbinatus. Meek & Worthen, 1860, 

 (Actinocrinus subturbinatus) Proc. 

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

 [Sig. somewhat top-shaped.] 



symmetricus, Hall, 1858, (AcLinocrinus 

 symmetricus) Geo. Rep. Iowa, Bur- 

 lington Gr. [Sig. symmetrical.] 



trinodus. Hall, 1858, (Actinocrinus trino- 

 dus) Geo. Rep. Iowa, Burlington Gr. 

 [Sig. three-knob])ed.] 



unicornis, Owen & Shumard, 1850, (Acti- 

 nocrinus unicornis) Jour. Acad. Nat. 

 Sci. Phil., vol. 2, new ser., Burlington 

 Gr. [Sig. single-horned.] 



unispinus. Hall, 1861, (Actinocrinus uni- 

 spinus) Desc. New Crinoidea, Bur- 

 lington Gr. [Sig. one-spined.] 

 EciiiNOCYSTiTES. Hall, 1864, 20th Reg. Rep. 

 N. Y. [Ety. eehinos, the sea urchin ; 

 kustis, a bladder.] 



nodosus. Hall, 1864, 20th Reg. Rep. Ni- 

 agara Gr. [Sig. knobbed.] 

 EcHiNO-ENCRiNiTES, Mcycr, 1826, Karst. 

 Archiv. Nat., vol. 7. [Ety. eehinos^ the 

 sea urchin ; krinon, a lily.] 



anatiformis, Hall, 1847, Pal.N. Y., vol, 1, 

 Trenton Gr. [Sig. resembling the 

 barnacle Anatifa.] I think this species 

 is not generically distinct from 

 Lepadocrinus mooH. 



fenestratus, Troost. Not defined. 

 Echinus drydenensis, see Eocidaris dryden- 

 ensis. 



gyracanthus, see Tentaculitesgyracanthus. 

 Edrio ASTER, Billings, 1858, Can. Org., Rem. 

 [Ety. edrion, a seat; aster, a star; 

 in allusion to the sessile condition of 

 the species. This name is a substitute 

 for Cyclaster, proposed in 1857, the 

 latter name having been preoccupied.] 



bigsbyi, Billings, 1857, (Cyclaster bigsbyi) 

 Rep. of Progr., Trenton Gr. [Ety. 

 proper name.] 

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

 [Ety. edrion, a seat; krinon, a lily.] 



pocilliformis. Hall, 1859, Pal. N. Y., vol. 

 3, Low. Held. Gr. [Sig. like a little 

 cup.] 



pyriformis. Hall, 1862, 15th Reg. Rep. N. 

 Y., Up. Held. Gr. [Sig. pear-shaped.] 



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

 Oriskany sandstone. [Sig. a little bag.] 



