WITH LIST OF SPECIMENS. 
21 
1UCLEOCRINUS, T. A. Conrad, 1842, Journ. Acad. Nat. Sci. 
Philadelphia, viii, p. 280. Olivanites, nom. nud., G. Troost, 1849, Amer. 
Journ. Sci. viii, p. 419. Elceacrinus, C. E. Roemer, 1851, Arch. Naturges. 
xvii (i), p. 375. Nudeocrinus (Conrad) : J. Hall, 1862, 15th Rep. 
State Cab. Nat. Hist. N.Y. pp. 144-146. Elceacrinus (Ptoemer); 
R. Etheridge fil. & P. H. Carpenter, 1886, Cat. Blastoidea Brit. Mus. 
p. 210. Type-species— N. elegans. 
Nucleocriims angularis. Olivanites angularis , S. S. Lyon, 1857, Rep. 
Geol. Surv. Kentucky, iii, p. 492, pi. v, ff. 2 ,2 a, 2 b. Nudeocrinus 
angularis (Lyon) : S. S. Lyon & S. A. Casseday, 1859, Proc. Amer. 
Assoc. Adv. Sci. iv, p. 295. Elceacrinus angularis (Lyon) : B. E. Shu- 
mard, 1866, Trans. Acad. Sci. St. Louis, ii, p. 368. Elceacrinus 
angularis (Lyon) : R. Etheridge fil. & P. H. Carpenter, 1886, Cat. 
Blastoidea Brit. Mus. p. 219. 
Elceacrinus angularis (S. S. Lyon): R. Etheridge fil. & P. H. Car¬ 
penter, 1886, Cat. Blastoidea Brit. Mns. p. 219, pi. ii, ff. 43, 44. 
Lower Devonian, Corniferous Limestone : Loc. ?, U.S.A. [E. 827.] 
A theca in matrix. The figures not very exact. 
-? Middle Devonian, Upper Hamilton Group: Cementville, 
Clark Co., Indiana, U.S.A. [E. 8176.] T. A. Worthen Coll. Small 
theca, perhaps young, attached to matrix. 
Nudeocrinus canadensis, H. Montgomery, 1881: v. Nueleocrinus 
elegans. 
Nudeocrinus conradi, or young of N. verneuili, J. Hall, 1862, 15th 
Rep. State Cab. Nat. Hist. N.Y. p. 149. Elceacrinus conradi (Hall): 
R. Etheridge fil. & P. H. Carpenter, 1886, Cat. Blastoidea Brit. Mus. 
p. 218. Perhaps distinct “ from all other species of the genus.” 
Nudeocrinus elegans, T. A. Conrad, 1842, Journ. Acad. Nat. Sci. 
Philadelphia, viii, p. 280, pi. xv, f. 17. Nudeocrinus hallii, L. Vanuxem, 
1842, Geol. Surv. Third District N.Y. p. 163. Nudeocrinus elegans , 
Conrad: J. Hall, 1862, 15th Rep. State Cab. Nat. Hist. N.Y. p. 147. 
Elceacrinus elegans (Conrad): B. E. Shumard, 1866, Trans. Acad. Sci. 
St. Louis, ii, p. 369. Nudeocrinus canadensis, H. Montgomery, 30 Dec. 
1881, Canad. Nat. & Geol. (n. s.) x, p. 83. Elceacrinus elegans (Conrad), 
and Elceacrinus canadensis (Montgomery) vel E. lucina var. canadensis : 
R. Etheridge fil. & P. H. Carpenter, 1886, Cat. Blastoidea Brit. Mus. 
pp. 216, 218, pi. xviii, f. 19. 
Nudeocrinus lucina , J. Hall (?): H. Montgomery, Dec. 30,1881, Canad. 
Nat. & Geol. (n. s.) x, p. 81, f. 1 a, b, c ; and Nudeocrinus canadensis , 
op. cit. p. 83. C. Middle Devonian, Hamilton Group: Limestone 
Quarry near Thedford (=Widder), Bosanquet township, Lambton Co., 
Ontario, Canada. [E. 7990.] 
Nudeocrinus greenei, S. A. Miller & W. F. E. Gurley, Dec. 1893, 
Bull. Illinois Mus. iii, p. 62, pi. vi, ff. 24, 25. 
