288 



ECHINODERMA TA. 



[/-KA. 



Pype X. penicillus. 



m, Meek, 1872, (Glyptocrinus baeri,) ] 



*.m. Jour. Sci. and Arts, 3d ser., vol. 3, 



plates; azygous area having a central 

 vertical series of plates which continue 

 up the ventral sac ; column square. 

 Type X. penicillus. 

 bae 

 Am 



p. 260, and Ohio Pal., vol. 1, p. 37, Hud. 

 Riv. Gr. 



penicillus, S. A. Miller, 1881, Jour. Gin. 

 Soc. Nat. Hist., vol. 4, p. 72, Hud. 

 Riv. Gr. 



ZEACRINUS, Troost, Catal. FOBS. 1850, and 

 described by Hall, 1858, Geo. Sur. Iowa, | 

 p. 541. [Ety. zea, Indian corn ; foinon, j 

 lily.] Calyx low, basin-shaped ; basals 

 5, hidden by the column ; subradials 5 ; j 

 radials 2x5, with from 1 to 6 additional ! 

 in the azygous ray ; azygous inter radials j 

 4 to 7; arms 10 to 40, with pinnules; j 

 ventral sac subpyramidal, covered with 

 small plates; column round. Type Z. | 

 magnoliiformis. 

 acanthophorus, see Hydreionocrinus acan- 



thophorus. 

 arboreus, Worthen, 1873, Geo. Sur. 111., j 



vol. 5, p. 534, St. Louis Gr. 

 armiger, see Hydreionocrinus armiger. 

 asper, Meek & Worthen, 1869, Proc. j 

 Acad. Nat. Sci. Phil., p. 150, and I 

 Geo. Sur. 111., vol. 5, p. 430, Burling- j 

 ton Gr. 



bifurcatus, McChesney, 1860, New Pal. 

 Foss., p. 10, and Trans. Chi. Acad. Sci., 

 vol. 1, p. 71, Kaskaskia Gr. 

 cariniferus, see Coeliocrinus cariniferus. 

 compactilis, Worthen, 1873, Geo. Sur. 111., 



vol. 5, p. 536, Kaskaskia Gr. 

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

 St. Mus. Nat. Hist., p. 27, and Geo. Sur. 

 111., vol. 7, p. 302, Keokuk Gr. 

 crassus, see Eupachycrinus crassus. 

 crateriformis, Troost. Not defined. 

 depressus, see Hydreionocrinus depressus. 

 discus, see Hydreionocrinus discus. 



elegans, Hall, 

 1858, Geo. Sur. 

 Iowa, p. 547, 

 Burlington Gr. 

 florealis,Yandell 

 & Shumard, 

 1847, (Cyatho- 

 crinus florea- 

 lis,) Cont. to 

 Geo. Ky., p. 

 24, Kaskaskia 

 Gr. 



formosm, seeEu- 

 pachyc r i n u s 

 lormosus. 

 inter medi us, j 

 Hall, 1858,' 

 Geo.Sur.Iowa, 

 p. 681, Kas- 

 FIG. 445. Zeacrinus kaskia Gr 



elegans. ' keokuk, Wor- 



then, 1882, Bull. No. 1, 111. St. Mus. Nat. 

 Hist., p. 28, and Geo. Sur. 111., vol. 7, p. 

 30, Keokuk Gr. 

 lyra, see Cceliocrinus lyra. 



magnoliiformis, Owen & Norwood, 1846, 



(Cyathocrinus magnoliiformis,) Re- 

 search Pot. Garb. Rocks Ky., and Geo. 



Sur. Iowa, p. 684, Kaskaskia Gr. 

 maniformis, Yandell & Shumard, 1847, 



(Poteriocrinus maniformis,) Cont. to 



Geo. Ky., p. 24. Kaskaskia Gr. 

 merope, Hall, 1863, 17th Rep. N. Y. St. 



Mus. Nat. Hist., p. 60, and Ohio Pal., 



vol. 2, p. 178, Waverly Gr. 

 moorii, Whitfield, 1882, Ann. N. Y. Acad. 



Sci., vol. 2, p. 227, Coal Meas. 

 mucrospinus, see Hydreionocrinus mucro- 



spinus. 

 nodosus, Wachsmuth & Springer, 1886, 



Revis. Palseocrinoidea, pt. 3, p. 243, 



Keokuk Gr. 

 ovalis, Lyon & Casseday, 1858, Am. Jour. 



Sci., 2d ser., vol. 29, p. 71, Kaskaskia Gr. 

 paternus. Hall, 1863, 17th Rep. N. Y. St. 



Mus. Nat. Hist., p. 59, Waverly Gr. 

 perangulatus, White, 1862, Proc. Bost. Soc. 



Nat. Hist., vol. 9, p. 11, Burlington Gr. 

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



St. Mus. Nat. Hist., p. 29, and Geo. Sur. 



III., vol. 7, p. 304, Burlington Gr. 

 planobrachiatus, Meek & Worthen, 1860, 



Proc. Acad. Nat. Sci. Phil., p. 391, and 



Geo. Sur. 111., vol. 2, p. 240, Keokuk Gr. 

 ramosus, Hall, 1858, Geo. Sur. Iowa, p. 



548, Burlington Gr. 

 sacculus, White, 1862, Proc. Bost. Soc. Nat. 



Hist., vol. 9, p. 12, Burlington Gr. 



FIG. 446. Zeacrinus spinuliferus. 



sacculus var. concinnus, White, 1862, Proc. 

 Bost. Soc. Nat, Hist., vol. 9, p. 12, Bur- 

 lington Gr. 



scobina, Meek & 

 Worthen, 1869, 

 Proc. Acad. Nat. 

 Sci. Phil., p. 149, 

 and Geo. Sur. 

 111., vol. 5, p. 

 426, Burlington 

 Gr. 



scoparius. Hall, 

 1861, Desc. New 

 Crin., p. 6, and 

 Jour. Bost. Soc. 

 Nat. Hist., vol. 7, 

 p. 305, Burling- 

 ton Gr. 



serratus, Meek & 

 Worthen, 1861, 

 Proc. Acad. Nat. Sci. Phil., p. 151, and 

 'Geo. Sur. 111., vol. 5, p. 428, Burling- 

 ton Gr. 



KiG. 447. /eacrinus 

 troostanus. Diagram. 



