90 



ECHINODERMATA. 



Retiocrinus, Billings, 1858, Can. Org. Rem. 



Decade 4. [Ety. retium, net ; krinon, 



a lily.] 

 fimbriatus, Billings, 1859, Can. Org. Rem. 



Decade 4, Hud. Riv. Gr. [Sig. fringed.] 

 stellaris, Billings, 1859, Can. Org. Rem. 



Decade 4, Trenton Gr. [Sig. rayed 



like a star.] 

 Rhodocrinus, Miller, 1821, Nat. Hist. Crin- 



oidea. [Ety. rhodon, a rose ; krinon, a 



lily-] 



asperatus, Billings, 1859, Can. Org. Rem. 



Decade 4, Chazy Gr. [Sig. made 



rough, uneven.] 

 barrisi, Hall, 1861, Desc. New Crinoidea, 



Burlington Gr. [Ety. proper name.] 

 barrisi var. divergens, Hall, 1861, Desc. 



New Crinoidea, Burlington Gr. [Sig. 



divergent, separating.] 

 gracilis, Hall, 1862, 15th Reg. Rep. N. Y., 



Ham. Gr. [Sig. slender.] 

 halli, Lyon, 1861, Proc. Acad. Nat. Sci., 



Phil., Low. Held. Gr. [Ety. proper 



name.] 

 melissa, Hall, 1863, Trans. Alb. Inst., vol. 



4, Niagara Gr. [Ety. mythological 



name.] 

 microbasalis, see Thysanocrinus microba- 



salis. 

 nanus, Meek & Worthen, 1866, Proc. 



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



[Sig. dwarfish.] 

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



Y., Ham. Gr. [Sig. covered with 



small knots.] 

 pyriformis, see Thysanocrinus pyriformis. 

 rectus, Hall, 1867, 20th Reg. Rep., Niag- 

 ara Gr. [Sig. straight.] 

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



Y., Ham. Gr. [Sig. covered with 



many spines.] 



varsoviensis, Hall, 1860, Supp. Geo. Rep. 

 Iowa, 

 name.] 



Iowa, Warsaw Gr. [ 



p. <j< 



Ety. 



proper 



wachsmuthi, Hall, 1861, Desc. New Crin- 

 oidea, Burlington Gr. [Sig. proper 

 name.] 



whitii, Hall, 1861, Desc. New Crinoidea, 

 Burlington Gr: [Ety. proper name.] 



whitii var. burlingtonensis, Hall, 1861, 

 Desc. New Crinoidea, Burlington Gr. 

 [Ety. proper name.] 



wortheni, Hall, 1858, Geo. Rep. Iowa, 



Burlington Gr. [Ety. proper name.] 



Saccocrinus, Hall, 1852, Pal. N. Y., vol. 2. 



[Ety. sakkos, a bag or sack ; krinon, a 



my-] 



christyi, Hall, 1863, (Actinocrinus chris- 

 tyi) Trans. Alb. Inst., vol. 4, Niagara 

 Gr. This species was called by Win- 

 chell & Marcy, 1865, Megistocrinus 

 marcouanus, and again by Hall, in 

 1865, Saccocrinus whitfieldi. 



ornatus, Hall & Whitfield, 1875, Ohio Pal., 

 vol. 2, Niagara Gr. [Sig. adorned.] 



semiradiatus, Hall, 1867, 20th Reg. Rep., 

 Niagara Gr. [Sig. half-rayed.] 



speciosus, Hall, 1852, Pal. N. Y., vol. 2, 

 Niagara Gr. [Sig. beautiful.] 



tennesseensis, Troost, Ms., Hall & Whit- 

 field, 1875, Ohio Pal., vol. 2, Niagara 

 Gr. [Ety. proper name.] 



whitfieldi, Hall, 1867, (Actinocrin.us chris- 

 tyi, 1863) 20th Reg. Rep., Niagara Gr. 

 This name must be regarded as a syn- 

 onym for Saccocrinus christyi as well 

 as Megistocrinus marcouanus, unless 

 the fossil should be referred to the 

 genus Actinocrinus, in which case, the 

 specific name christyi being preoccu- 

 pied, marcouanus would have the 

 preference. 

 Scaphiocrinus, Hall, 1858, Geo. Rep. Iowa. 

 [Ety. scaphion, a skiff; krinon, a lily.] 



abnormis, Worthen, 1875, Geo. Sur. 111., 

 vol. 6, St. Louis Gr. [Sig. abnormal.] 



aegina, Hall, 1863, Desc. New Crin. Wav- 

 erly sandstone, Waverly Gr. [Ety. 

 mythological name.] 



sequalis, Hall, 1861, Desc. New Crin., 

 Keokuk Gr. [Sig. equal.] 



bayensis, Meek & Worthen, 1865, Proc. 

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

 [Ety. proper name.] 



carbonarius, Meek & Worthen, 18 61, 

 Proc. Acad. Nat. Sci. Phil., Up. Coal 

 Meas. [Sig. from the coal measures.] 



carinatus. Hall, 1861, Desc. New Crin., 

 Burlington Gr. [Sig. keeled.] 



clio, Meek & Worthen, 1869, Proc. Acad. 

 Nat. Sci. Phil., Burlington Gr. [Ety. 

 mythological name.] 



coreyi, Meek & Worthen, 1869, Proc. 

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

 [Ety. proper name.] 



dactyliformis, Hall, 1858, Geo. Rep. Iowa, 

 St. Louis Gr. [Sig. finger-shaped.] 



decabrachiatus, Hall, 1858, Geo. Rep. 

 Iowa, KaskaskiaGr. [Sig. ten-armed.] 



decadactylus, Meek & Worthen, 1860, 

 (Poteriocrinus decadactylus) Proc. 

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

 [Ety. ten-fingered.] P. decadactylus 

 was preoccupied. 



delicatus, Meek & Worthen, 1869, Proc. 

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

 [Sig. delicate.] 



depressus, Meek & Worthen, 1870, Proc. 

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

 [Sig. depressed.] 



dichotomus, Hall, 1858, Geo. Rep. Iowa, 

 Burlington Gr. [Sig. dividing into 

 two.] 



divaricatus, Hall, 1860, Supp. to Geol. 

 Iowa. Burlington Gr. [Sig. wide 

 apart.] 



doris, Hall, 1861, Desc. New Crinoidea, 

 Burlington Gr. [Ety. mythological 

 name.] 



fiscellus, Meek & Worthen, 1869, Proc. 

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

 [Sig. a small basket of woven slender 

 twigs.] 



halli, Hall, 1861, Desc. New Crinoidea, 

 Burlington Gr. [Ety. proper name.] 



