216 CATALOGUE OF THE BLASTOIDEA. 



Olivanites anqularis, Lyon. Corniferous Limestone, Lower Devonian ; Kentucky, 



Ohio. 

 Nucleocrinus Canadensis, Montg. 1 Hamilton Group, Upper Devonian ; Ontario. 

 Nucleocrinus Conrad/, Hall 2 . Upper Helderberg Group, Lower Devonian; 



New York State. 

 Nucleocrinus elegans, Conrad. Hamilton Group, Upper Devonian ; New York 



State. 

 Nucleocrinus lucina, Hall. Hamilton Group, Upper Devonian ; New York State. 

 Elceacrinus meloniformis, Barris. Hamilton Group, Upper Devonian ; Michigan. 

 Elceacrinus obovatus, Barris. Hamilton Group, Upper Devonian ; Michigan, 



Iowa, and New York State. 

 Pentremites Yerneuili, Troost (MS.). Corniferous Limestone, Lower Devonian ; 

 Kentucky, Ohio. 

 Distribution. Eheacrinus is purely a Devonian genus, and appears to be generally 

 distributed throughout that formation in the United States and Canada, but is 

 unknown in rocks of a similar age in Europe. There appear to be no species common 

 to the Lower and Upper Devonian. 

 Type. Pentremites Yerneuili, Troost. 



Elceacrinus Verneuili (Troost, sp., MS.), Boemer. 

 (PL II. fig. 45 ; PL XVII. fig. 19 ; PL XVIII. figs. 16-18 ; PL XIX. fig. 7.) 

 Pentremites Verneuili, Troost (MS.), 6th Report Geol. State Tennessee, 1841, p. 14. 

 Pentremites Verneuilii, D'Orb., Prod. Pal. Strat. 1849, i. p. 102. 

 Olivanites Verneuilii, Troost (MS.), American Journ. Sci. 1849, vol. viii. p. 419; Proc. 



American Assoc. Adv. Sci. for 1849 [1850], p. 62. 

 Elceacrinus Verneuilii, Roemer, Archiv f. Naturgesch. 1851, Jahrg. xvii. Bd. i. p. 379, t. 8. 



f. 1, a-d. 

 Olivanites Verneuilii, Lyon in Owen's 3rd Report Geol. Survey Kentucky, 1857, p. 487, t. 5. 



f. 1, a-d. 

 Pentremites Verneuilii, Shumard, Trans. St. Louis Acad. Sci. 1858, vol. i. no. 2, p. 247. 

 Elceacrinus Verneuilii, Roemer in Bronn's Lethsea Geogn., Dritte Aufl. 1852-54, Theil ii. 



p. 284, 4. f. 10, a & b. 

 Nucleocrinus Verneuili, Lyon and Casseday, Proc. American Acad. 1859, vol. iv. p. 295. 

 Elaacrinus Verneuili, Bronn, Klassen und Ordn. Thier-Reichs, 1859, Bd. i. t. 23. f. 5, a-e. 

 Eheacrinus Verneuillii, Dujardin and Hupe, Hist. Nat. Zooph. Echinod. 1862, p. 100. 

 Elaacrinus Verneuili, Shumard, Trans. St. Louis Acad. Sci. 1865, vol. ii. no. 2, p. 369. 

 Nucleocrinus Verneuilii, Billings, American Journ. Sci. 1870, vol. 1. p. 229, f. 3-6. 

 Elaacrinus Verneuili, E. & C, Ann. & Mag. Nat. Hist. 1883, vol. ix. p. 231. 



Sp. Char. Calyx olive-shaped, roundly ellipsoidal, more attenuated below than 

 above; summit flat or a little concave; base contracted, with a deep pentagonal 



1 Montgomery thinks this may he a var. of E. lucina, Hall, sp. 



2 Hall says perhaps a var. of E. Verneuili. 



