288 



ECHINODERMA TA. 



[/.KA. 



plates; azygous area having a central 

 vertical series of plates which continue 

 up the ventral sac; column Bquare. 

 Type X. penicillus. 

 baeri, Meek, 1872, (Glyptocrinus baeri,) 

 Am. Jour. Sci. and Arts, 3d ser., vol. 3, 

 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. 

 Zracrinus, Troost, Catal. Foss. 1850, and 

 described hy Hall, 1858, Geo. Sur. Iowa, 

 p. 541. [Ety. zea, Indian corn ; brinon, 

 lily.] Calyx low, basin-shaped; basals 

 5, hidden by the column; 8ubradials5; 

 rudials 2x5, with from 1 to 6 additional 

 in the azygous ray ; azygous interradials 

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

 ventral sac subpyramidal, covered with 

 small plates; column round. Type Z. 

 magnoliiformis. 

 aeoMtkophorut, see Hydreionocrinus acan- 



thophorns. 

 arboreus, Worthen, 1873, Geo. Sur. III., 



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

 armiger, see Hydreionocrinus armiger. 

 asper, Meek <fe Worthen, 1809, Proe. 

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

 Geo. Sur. III., vol. 5, p. 430, Burling- 

 ton Gr. 

 bifurcatus, McChesney, 1860, New Pal. 

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

 vol. 1 1 p. 71, Kaskaskia Gr. 

 carinifirm, see C<eliocrinns carinifrrus. 

 compactilis. Worthen, 1873, Geo. Sur. Elk, 



vol. 5, p. 536, Kaskaskia Gr. 

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

 St. Mus. Nat. Hist., i». 27, and Geo. Sur. 

 III., vol. 7, p. 80S, Keokuk Gr. 

 crcmus, see Eupachycrinus crassus. 

 crateriformis, Troost. Not defined. 

 deprettux, see Hydreionocrinus depressus. 

 discus, see Hydreionocrinus discus. 



elegans, Hall, 

 1858, Geo. Sur. 

 Iowa, p. 547, 

 Burlington Gr. 

 tlorealis.Yandell 

 A Slmmard, 

 1S47, (Cyatho- 

 crinus florea- 

 lis,) Cont. to 

 Geo. Ky., p. 

 24, Kaskaskia 

 Gr. 

 formosuH, seeEu- j 

 pachyc r i n u s i 

 formosus. 

 intermedi us, i 

 Hall, 185 8,! 

 Geo.Sur.Iowa, i 

 p. 681, Kas- | 

 kaskia Gr. 

 keokuk, ""Wor- j 

 then, 1882, Bull. No. 1, ID. Sr. Mus. Nat. I 

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

 30, Keokuk Gr. 

 lyra, see Cceliocrinus lyra. 



Fiii. 14$. — Zeacrintis 

 elegans. 



magnoliiformis, Owen <fe Norwood, 1846, 



(Cyathoerinus magnoliiformis,) Re- 

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



Sur. Iowa, p. 684, Kaskaskia Gr. 

 maniformis, Yandell & Shumanl, 1S47. 



(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, Waverlv Gr. 

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



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

 mucrospinus, see Hydreionocrinus mucro- 



spinus. 

 nodosus, Wachsmuth A Springer, 1686, 



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



Keokuk Gr. 

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



Sci., 2dser., vol. 29, p. 71, Kaskaskia Gr. 

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



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

 perangulatus, White, 1862, Proe. Bost. Soc. 



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

 pikcnsis, Worthen, 1882. Bull., No. 1, III. 



St. Mus. Nat. Hist., p. 2i), and Geo. Sur. 



III., vol. 7, p. 304, Burlington (Jr. 

 plauobrachiatus, Meek & Worthen, I860. 



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



Geo. Sur. III., vol.2, p. 240, Keokuk (Jr. 

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



548, Burlington (Jr. 

 sa. •cuius, While. 1862, PrOC. Host. Soc. Nat. 



Hist., vol. !», |>. 12, Burlington Gr. 



Fio. 416— Zeacrinus ■plnallfertM. 



sacnilus var. concinnus, White, 1862, Proc. 



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

 lington Gr. 

 Bcoblna, Meek & 



Worthen, 1869, 



Proc. Acad. Nat. 

 i. Phil., p. 149, 



and Geo. Sur. 



111., vol. 5, p. 



426, Burlington 



Gr. 

 scoparins. Hall, 



1st; I, Desc. New 



Oin., p. (i, and 



Jour. Bost. Soc. 



Nat. Hist., vol. 7, 



p. 305, Burling- 

 ton Gr. 

 serratus, Meek & 



Worthen, 1861, 



Proc. Acad. Nat. 



Geo. Sur. 

 ton Gr. 



Fig. 447.-Zpacrinu8 

 troostanus. Diagram. 



Sci. Phil., p. 151, and 

 111., vol. 5, p. 428, Burling- 



