Flori 
ville, O. 
BATOCRINIDA. - 019 
zon and Locality.— Upper part of Hudson River group; Waynes- 
Type in the collection of I. H. Harris, Esq., Waynesville. 
B. PERIECHOCRINITES. 
PERIECHOCRINUS Austin. 
1842. Austin; Aun. & Mag. Nat. Hist., Vol. X., p. 109 (no definition). 
1843. Austin; ibid., Vol. XL, p. 203. 
1843. Morris; Catal. Brit. Foss. (Hd. 1), p. 56 (Hd. 2, p. 86). 
1855. McCoy; Synops. Brit. Palzoz. Foss., p. 56. 
1857. Pictmt; Traité de Paléont., Vol. LV., p. 323. 
1859. Murcuison; Siluria, p. 536. 
1862. Dusarpin and Hur; Hist. Natur. des Zooph. Hchin., p. 187. 
1878. AneELIn; Iconogr. Crin. Suec., p. 6. 
1879. Zrrrpi; Handb. der Paleont., Vol. I., p. 369. 
I88l.- W. 
Syn. 
Syn. 
Syn. 
Syn. 
Syn. 
Syn. 
Syn. 
Syn. 
Syn. 
Syn 
and Sp.; Revision Paleocr., Part II., p. 127 (Proceed. Acad. Nat. Sci. Phila., p. 301). 
Actinocrinites — J. S. Mitier; 1821, History of the Crinoidea, p. 116. 
Actinocrinus — Puruiirs ; 1839, Murch. Silur. Syst., p. 673, Plate 18, Fig. 4. 
Trochocrinites — Portiock; 1848, Geol. of Londonderry, p. 345. 
(?) Pradocrinus — Du Vurnevit; 1850, Bull. Soc. Géol. France (ser. II.), Vol. VIL, p. 184. 
Geocrinus — D’OrBieny; 1850, Prodr. de Paléont., Vol. I, p. 46. 
Saccocrinus — Troost; 1850; List of Crin. Tenn. (no description). 
Saccocrinus — Hat; 1852, Paleont. N. York, Vol. IL., p. 205. 
Pyxidocrinus — MULLER; (in part) ; 1857, Neue Hchin. Hifl. Kalk., p. 253. 
(?) Zrochocrinites — PANDER, 1858, Helmerson’s Geol. Bemerk. auf einer Reise in Sweden, etc., 
p. 20. 
. Saccocrinus —F. RoEMeR; 1860, Silur. Fauna West Tenn., pp. 42-44. 
Syn. Actinocrinus (Megistocrinus) Waun ; 1861, Bost. Journ. Nat. Hist., p. 271. 
Syn. Actinocrinus (Pradocrinus) —M. and W.; 1861, Proceed. Acad. Nat. Sci. Phila., p. 183. 
Syn. Actinocrinus — Hatt, 1863, Trans. Alb. Inst., Vol. V., p. 196. 
Syn. 
Megistocrinus — Wincu. and Marcy; 1865; (not O. and Su.), Mem. Bost. Soc. Nat. Hist., L, 
Paoe 
Syn. Actinocrinus (Saccocrinus) — M. and W.; 1869, Geol. Rep. Illinois, Vol. III., pp. 347 and 470. 
Syn. 
Megistocrinus (Saccocrinus) M. and W.; 1878, Geol. Rep. Illinois, Vol. V., p. 397. 
Syn. Saecocrinus — Hawi; 1879, 28th Rep. N. Y. State Mus. Nat. Hist. (Revised Ed.), p. 127. 
Syn 
. Saccocrinus —8. A. Mitter — Journ. Cincin. Soc. Nat. Hist. of 1881 and 1882. 
Calyx large, elongate, bell- or urn-shaped. Plates thin, and their surfaces 
smooth or delicately sculptured; the radial plates generally having a ridge 
passing from plate to plate, which increases in prominence upwards until it 
becomes 
Basa 
identified with the free arms. 
Is three, equal, forming a deep cup; column facet wide. Radials 
and costals long and narrow; constricted at their upper and lower faces, 
sometim 
angular 
es connected merely by the point of an angle. Costals two, hex- 
and heptangular. Distichals in two to four rows; supporting from 
two to six palmars, except in a few cases where the arms are free above the 
