CYC. DEL.] 



ECHINODERMA TA. 



237 



somersi, Whitfield, 1882, Ann. N. Y. 

 Acad. Sci., vol. 2, p. 226, Coal Meas. 



spurius, see Barycrinus spurius. 



stellatus, see Barycrinus stellatus. 



stillativus. White, 1880, Proc. U. S. Nat. 

 Mus., vol. 2, p. 258, and Cont. to Pal. 

 No. 6, p. 125, Up. Coal. Meas. 



subtumidns, Meek & Worthen, 1869, Proc. 

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

 Sur. 111., vol. 5, p. 487, Keokuk Gr. 



tennesseese, Troost. Not defined. 



tenuibrachiatus, Lyon, 1869, Trans. Am. 

 Phil. Soc., vol. 13, p. 460, Up. 

 Held. Gr. 



tenuidactylus, Meek & Worthen, 1868, 

 Proc. Acad. Nat. Sci. Phil., p. 238, and 

 Geo. Sur. 111., vol. 5, p. 403, Burling- 

 ton Gr. 



thomse, see Barycrinus thomee. 



tiarssformis, see Ichthyocrinus tiariformis. 



tumidut, see Barycrinus tumidus. 



vanhornii, S. A. Miller, 1881, Jour. Cin. 

 Soc. Nat. Hist., vol. 4, p. 261, Ni- 

 agara Gr. 



viminalis, Hall, 1861, Desc. New Crin., 

 p. 5, syn. for C. iowensis. 



wachsmuthi, see Barycrinus wachsmuthi. 



waldronensis, Miller & Dyer, 1878, Cont. 

 to Pal. No. 2, p. 6, Niagara Gr. Wachs- 

 muth refers it to Macrostylocrinus. 



waukoma, Hall, 1864, 20th Rep. N. Y. St. 

 Mus. Nat. Hist., p. 367, Niagara Gr. 



wortheni, Lyon, 1861, Proc. Acad. Nat. 



Sci. Phil., p. 410, Up. Held. Gr. 

 Cyclaster, Billings, 1857, Rep. of Progr. 

 This name was preoccupied. See Ed- 

 rioaster. 



bigsbyi, see Edrioaster bigsbyi. 

 CYCLOCYSTOIDES, Billings & Salter, 1858, 

 Can. Org. Rem., Decade 3, p. 86. [Ety. 

 kuklos, circle ; kustis, bladder ; eidos, 

 form.] Body consisting of a circular 

 disk, surrounded by a series of short, 

 cylindrical, perforated, porous plates ; 

 the interior is covered by an integu- 

 ment of small plates, with radiating 

 channels, which bifurcate and connect 

 with the channel in the marginal series, 

 which makes a complete circle ; mouth 

 supposed to be central ; mammillary 

 elevations on the exterior of the rim as 

 if for the attachment of small spines. 

 Type C. halli. 



anteceptus, Hall, 1866, 24th Rep. N. Y. 

 St. Mus. Nat. Hist., p. 219, Tren- 

 ton Gr. 



FIG. 278. Cyclocystoides magnus. 



bellulus, Miller & Dyer, 1878, Jour. Cin. 

 Soc. Nat. Hist., vol. 1, p. 34, Hud. 

 Riv. Gr. 



halli, Billings, 1858, Can. Org. Rem., 



Decade 3, p. 86, Trenton Gr. 

 huronensis, Billings, 1865, Pal. Foss., vol. 



1, p. 393, Hud. Riv. Gr. 

 magnus, Miller & Dyer, 1878, Jour. Cin. 



Soc. Nat. Hist., vol. 1, p. 32, and vol. 4, 



p. 70, Hud. Riv. Gr. 

 minus, Miller & Dyer, 1878, Jour. Cin. 



Soc. Nat, Hist., vol. 1, p. 33, Hud. 



Riv. Gr. 

 mundulus, Miller & Dyer, 1878, Jour. 



Cin. Soc. Nat. Hist., vol. 1, p. 34, Hud. 



Riv. Gr. 

 nitidus, Faber, 1886, Jour. Cin. Soc. Nat. 



Hist., vol. 9, p. 17, Hud. Riv. Gr. 

 parvus, Miller & Dyer, 1878, Jour. Cin. 



Soc. Nat. Hist., vol. 1, p. 33, Hud. 



Riv. Gr. 

 salted, Hall, 1866, 24th Rep. N. Y. St. 



Mus. Nat. Hist., p. 218, Trenton 



Gr. 

 CYSTOCRINUS, Roemer, 1860, Sil. Fauna West 



Tenn., p. 56. [Ety. kustis, bladder; 



krinon, lily.] A cylindrical body, the 



interior of which looks like a crinpid 



column, but the external part consists 



of a compact mass of tubes connecting 



with the central canal. Wachsmuth 



has called it a detached column, but it 



is anomalous, and I retain the genus. 



Type C. tennesseensis. 

 tennesseensis, Roemer, 



1860, Sil. Fauna West 



Tenn, p. 56, Niagara Gr. 

 Cytocrinus, Roemer, 1860, Sil. 



Fauna West Tenn., p. 



46, syn for Melocrinus. 

 Isevis, see Melocrinus Isevis. 

 D a? m o n icri- 



Not de- r--^^h 

 fined. 

 Dec adactylo- 



rWan* l^nt FlG - 279. Cystocrinus tennes- 

 uwen. i>ioi/ seensis. 



defined. 



Decadocrinus, Wachsmuth & Springer, 

 1879, Proc. Acad. Nat. Sci. Phil, and 

 Revis. Palseocrinoidea, pt. 1, p. 119. It 

 was described as a subgenus of Po- 

 teriocrinus, but it hardly arises to that 

 dignity. Their type is Scaphiocrinus 

 scalaris. 



DELTACKINUS, Ulrich, 1886, 14th Rep. Geo. 

 Sur. Minn., p. 109. [Ety. delta, Greek 

 letter; krinon, lily.] Basal piece tri- 

 angular, composed of anchylosed plates; 

 four plates form the dorsal side 

 above the base; lower central plate tri- 

 angular and separated from the upper 

 triangular plate by the union of the 

 two lateral radial plates. Distinguished 

 from CalceocrinuSjWhich hasa long plate 

 on the dorsal side between the lateral 

 radials instead of the two triangular 

 plates separated, as above described by 

 the union of the two radials. Type D. 

 clarus. 



