THE SPECIES OF BLASTOIDEA. 
STEGANOBLASTUS. Astrocystites , J. F. Whiteaves, July 1897, 
Canad. Rec. Sci. vii, p. 287 (non Asterocystis , Haeckel). Steganoblastus, 
J. F. Whiteaves, Jan. 1898, Canad. Rec. Sci. vii, p. 395. Type-species 
— S. ottawaensis. 
Steganoblastus canadensis, J. F. Whiteaves, 1898 : v. Stegano¬ 
blastus ottawaensis. 
Steganoblastus ottawaensis. Astrocystites ottawaensis, J. F. Whit¬ 
eaves, July 1897, Canad. Rec. Sci. vii, p. 287, ff. 1-3. Steganoblastus 
canadensis , J. F. Whiteaves, Jan. 1898, Canad. Rec. Sci. vii, p. 395. 
STEPHANOCRINUS, T. A. Conrad, 1842, Journ. Acad. Hat. Sci. 
Philadelphia, viii, p. 278. Type-species— S. angulatus. This genus is 
now referred to the Crinoidea, and the names of undoubted Crinoid 
species are not quoted in the present list. 
Stephanocrinus pentalobus (Hall) : S. A. Miller, 1889: v. Meta- 
blastus? pentalobus. 
Stephanocrinus pulchellus (S. A. Miller & C. B. Dyer) : S. A. 
Miller, 1889 : v. Codaster pulchellus. 
TRICCELOCRINUS, F. B. Meek & A. H. Worthen, 1868, Proc. 
Acad. Hat. Sci. Philadelphia for 1868, p. 358; and 1873, Geol. Surv. 
Illinois, v, p. 507 (as subgenus of Pentremites). Tricoelocrinus , Meek & 
Worthen: R. Etheridge fil. & P. H. Carpenter, 1883, Ann. Mag. Hat. 
Hist. (5) xi, p. 242; and 1886, Cat. Blastoidea Brit. Mus. p. 203. 
Type-species— T. woodmani. 
Tricoelocrinus ? carpenteri, R. Etheridge fil., 1892, in R. Etheridge 
& R. L. Jack, Geol. & Palseont. Queensland, p. 212, pi. xliv, f. 3. 
Tricoelocrinus? laterniformis. Pentremites laterniformis, D. D. 
Owen & B. F. Shumard, 1850, Journ. Acad. Hat. Sci. Philadelphia (2) 
ii, p. 66, pi. vii, f. 15. “ Troosticrinus laterniformis [Owen & Shumard] 
(=Pentatremites obliquatus , Roemer) : B. F. Shumard, 1866, Trans. Acad. 
Sci. St. Louis, ii, p. 384. “ Pentremites laterniformis [Owen & Shu¬ 
mard] (=P. sulcatus , Roemer)”: G. Hambach, 1880, Trans. Acad. 
Sci. St. Louis, iv, p. 147. “ Internal cast of Pentremites ? sp. indet.,” 
R. Etheridge fil. & P. H. Carpenter, 1886, Cat. Blastoidea Brit. Mus. 
pp. 156, 192. Troostocrinus laterniformis (Owen & Shumard) : S. A. 
Miller, 1892, First Appendix to H. Amer. Geol. & Palseont. p. 682. 
Tricoelocrinus ? leei, G. F. Whidborne, 1889, Geol. Mag. (3) vi, p. 80. 
Pentremites sp., G. F. Whidborne, 1881, Geol. Mag. (2) viii, p. 288; 
“fragmentary specimen .... in the collection of Mr. J. E. Lee.” 
Metablastus sp., u has much the aspect of a TricodTrciAmis or 
