WITH LIST OF SPECIMENS. 
3 
BLASTOIDOCRINUS, E. Billings, 1859, Canad. Organic Bemains, 
dec. iv, p. 18. Type-species— B. car chariceclens. 
Blastoidocrinus carcharisedens, E. Billings, 1859, Canad. Organic 
Bemains, dec. iv, p. 18, pi. i, ff. 1 a-n. Blastoidocrmus carcharicedens , 
Billings: E. Schmidt, 1874, Mem. Acad. Sci. St. Petersbourg (7) xxi, 
No. 11, p. 29. Blastoidocrinus car char icedens, Billings: B. Etheridge 
fil. & P. H. Carpenter, 1886, Cat. Blastoidea Brit. Mus. p. 120. 
GOB ASTER, F. McCoy, April 1849, Ann. Mag. Nat. Hist. (2) iii, 
p. 250. Codonaster, C. E. Boemer, 1851, Arch. Naturges. xvii (i) p. 381. 
Codaster , McCoy (including Heteroschisma, q. v.) : B. Etheridge fil. & 
P. H. Carpenter, 1886, Cat. Blastoidea Brit. Mus. p. 259. Type-species 
— C. acutus (=young of C . trilobatus). 
Codaster acutus, E. McCoy, April 1849, Ann. Mag. Nat. Hist. (2) iii, 
p. 251. Codonaster acutus, McCoy : C. F. Boemer, 1851, Arch. Naturges. 
xvii (i) p. 385; refers to it Pentremites pentagonalis, Forbes (q. v.). 
Etheridge & Carpenter refer to it Pentremites (?) astraformis (q. v.), and 
consider it as young of Codaster trilobatus : v. G. trilobatus, var. 
acutus. 
Codaster alternatus (vel attenuatus) [both probably misprint for 
attenuatus], S. S. Lyon, 1857, in D. D. Owen’s 3rd Bep. Geol. Surv. 
Kentucky, pp. 493, 498, pi. v, f. 3 a [non 3 b , v. Codaster joyramulatas], 
Reteroschisma alternatum .(Lyon): C. Wachsmuth, 1883, Bep. Geol. 
Surv. Illinois, vii, p. 353, footnote. Codaster alternatus , Lyon: B. Ethe¬ 
ridge fil. & P. H. Carpenter, 1886, Cat. Blastoidea Brit. Mus. pp. 33, 
265, 267. Codaster attenuatus , S. A. Miller, 1889, N. Amer. Geol. & 
Palaeont. p. 232. 
Codaster alternatus, var. elongatus. Heteroschisma alternatum , 
var. elongatum , C. Wachsmuth, 1883, Bep. Geol. Surv. Illinois, vii, 
p. 354, footnote. Codaster alternatus, var. elongatus (Wachsmuth) : B. 
Etheridge fil. & P. H. Carpenter, 1886, Cat. Blastoidea Brit. Mus. 
pp. 33, 263, 267, pi. x, ff. 19, 20. 
Codaster americanus, B. E. Shumard, 1858, Trans. Acad. Sci. St. 
Louis, i, p. 239. Begarded as probable var. of C. pyramidatus, Shumard 
(q. v.): B. Etheridge fil. & P. H. Carpenter, 1886, Cat. Blastoidea Brit. 
Mus. p. 265. 
Codaster attenuatus : v. Codaster alternatus. 
Codaster blairi, S. A. Miller & W. F. E. Gurley, Dec. 1895, Bull. 
Illinois Mus. vii, p. 86, pi. v, If. 20, 21, 22. 
Codaster canadensis, E. Billings, 1869, Amer. Journ. Sci. (2) xlviii, 
p. 79. B. Etheridge fil. & P. H. Carpenter, 1882, Ann. Mag. Nat. Hist. 
(5) ix, p. 236, and 1886, Cat. Blastoidea Brit. Mus, p. 265, refuse to 
b2 
