EUP.] 



ECHINODERMA 7 A. 



245 



plates ; rays consisting of a double 

 series of alternating, subquadrate, am- 

 bulacral ossicles, with curved ambula- 

 cral plates ; oral plates 10 ; pores large, 

 two rows in each ray ; adambulacral 

 and disk-plates spine-bearing. Type E. 

 logani. 



concinnus, Ringueberg, 1886, Bull. Buff. 

 Soc. Nat. Sci., vol. 5, p. 8, Niag- 

 ara Gr. 



logani, Hall, 1868, 20th Rep. N. Y. St. 

 Mus. Nat. Hist., p. 333, Ham. Gr. 

 Eupachycrinus, Meek & Worthem, 1865, 

 Proc. Acad. Nat. Sci. Phil., p. 159. 

 [Ety. eu, very ; pachys, thick ; krinon, 

 lily.] Calyx saucer or bowl shaped ; 

 plates heavy, tumid ; sutures strongly , 

 defined ; basals 5 ; subradials 5 ; ra- 

 dials 2x5, and sometimes there are 

 third radials in some of the rays ; 

 the second radials are often spine- 

 bearing ; azygous interradials 3 ; arms 

 5 or 10, composed of a double series 

 of plates, bearing pinnules ; column 

 round. Type E. quatuordecembrach- 

 alis. 



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

 111. St. Mus. Nat. Hist., p. 34, and 

 Geo. Sur. 111., vol. 7, p. 311, Kas- 

 kaskia Gr. 



bassetti, Worthen, 1875, Geo. Sur. 111., 

 vol. 6, p. 528, Coal Meas. 



boydi, Meek & Worthen, 1870, Proc. 

 Acad. Nat. Sci. Phil., p. 30, and 

 Geo. Sur. 111., vol. 5, p. 554, Kas- 

 kaskia Gr. 



craigi, Worthen, 1875, Geo. Sur. III., vol. 

 6, p. 527, Coal Meas. 



crassus, Meek & Worthen, 1870, (Cyatho- 

 crinus crassus,) Proc. Acad. Nat. Sci. 

 Phil., p. 392, and Geo. Sur. 111., vol. 2, 

 p. 314, Low. Coal Meas. 



Fig. 304.— Eupachycrinus crassus. Diagram. 



fayettensis, Worthen, 1873, Geo. Sur. 111., 

 vol. 5, p. 565, Up. Coal Meas. 



formosus, Worthen, 1873, (Zeacrinus 

 formosus,) Geo. Sur. 111., vol. 5, p. 549, 

 Kaskaskia Gr. 



germanus, S A. Miller, 1879, Jour. Cin. 

 Soc. Nat. Hist., vol. 2, p. 40, Kaskas- 

 kia Gr. 



gracilis, Wetherby, 1880, (Cromyocrinus 

 gracilis,) Jour. Cin. Soc. Nat. Hist., vol. 

 2, p. 248, Kaskaskia Gr. 



hemisphericus, Shumard, 1858, (Poterio- 

 crinus hemisphericus,) Trans. St. Louis, 

 Acad. Sci., vol. 1, p. 221, and Geo. Sur. 

 111., vol. 5, p. 561, Coal Meas. 



; -Wd 



Fig. 305.— Eupachycrinus sangamonensis. 

 Diagram. 



monroensis, Worthen, 1882, Bull. No. 1, 

 St. Mus. Nat. Hist., p. 30, Kaskas- 

 kia Gr. 



orbicularis, Hall, 1861, (Scaphiocrinus or- 

 bicularis,) Bost. Jour. Nat. Hist., p. 311, 

 Keokuk Gr. 



pentalobus, Hall, 1858, (Cyathocrinus 

 pentalobus,) Geo. Sur. Iowa, p. 687, 

 Kaskaskia Gr. 



platybasis, White, 1876, Geo. Uinta 

 Mountains, p. 108, and Cont. to Pal., 

 No. 6, p. 124, Low. Aubrey Gr. 



quatuordecembrachialis, Lyon, 1857, 

 (Grapliiocrinus quatuordecembrachi- 

 alis,) Geo. Sur. Ky., vol. 3, p. 477, Kas- 

 kaskia Gr. 



sanctiludovici, Worthen, (in press,) Geo. 

 Sur. 111., vol. 8, p. 98, St. Louis Gr. 



sangamonensis, Meek & Worthen, 1861, 

 (Cyathocrinus sangamonensis,) Proc. 

 Acad. Nat. Sci. Phil., p. 392, and 

 Geo. Sur. 111., vol. 2, p. 310, Up. 

 Coal Meas. 



spartarius, S. A. Miller, 1879, Jour. Cin. 

 Soc. Nat. Hist, vol. 2, p. 38, Kaskas- 

 kia Gr. 



subtumidus, Worthen, 1867, (Zeacrinus 

 subtumidus,) Geo. Sur. 111., vol. 5, p. 

 548, Kaskaskia Gr. 



tuberculatus, Meek & Worthen, 1865, 

 (Erisocrinus tuberculatus,) Proc. Acad. 

 Nat. Sci. Phil., p. 150, and Geo. Sur. 

 111., vol. 2, p. 319, Coal Meas. 



verrucosus, White & St. John, 1869, Trans. 

 Chi. Acad. Sci., p. 117, Coal Meas. 



17 



