348 TRANS. OF THE ACAD. OF SCIENCE. 



ACTIXOCPJNUS, Miller (continued). 



rusticus, Hall, Feb., 1861. Dee. New Crinoidea, Prelim. Not., p. 



2.— Id. Jan., 1801. Bost. Jour. Nat. Hist.., vol. vii., p. 267. 



— Enc. — Burlington, Iowa, 

 scitulus, Meek and Worthen, Sep*., 1860. Pr. Ac. Nat. Sci. Phil., 



p. 386. — Enc. — Warren Co., Illinois, 

 sculptus, Hall, 1858. Geol. Iowa, vol. i., p. 582, pi. 10, fig. 11. — 



A. tenuisculptus, McCbesney, 1860. New Palaeozoic Fos- 

 sils, p. 15, pi. v., fig. 1. — Enc. — Burlington, Iowa, 

 securis, Hall, Feb., 1861. Des. New Crinoidea, Prelim. Not., p. 



14. — Enc. — Burlington, Iowa, 

 senarius, Hall, 1860. Geol. Iowa, Sup. to vol. i., p. 25.— Enc. — 



Burlington, Iowa, 

 sexarmatus, Hall, 1860. Geol. Iowa, Sup. to vol. i., p. 21. 



(Compare A. proboscidialis, Hall.) — Enc. — Burlington, 



Iowa. 

 Sillimani, Meek and Wortben, June, 1861. Proc. Acad. Nat. Sci. 



Phil., p. 134. — Enc. — Warren Co., Illinois, 

 similis, Hall, 1860. Geol. Iowa, Sup. to vol. i., p. 41. — Arch. — 



Warsaw, Illinois, 

 sinuosus, Hall, 1860. Geol. Iowa, Sup. to vol. 1, p. 26. — Enc. — 



Burlington, Iowa. 

 speciosus, Meek and Wortben, Sept., 1860. Proc. Acad. Nat. Sci. 



Phil., p. 386. — Enc, — Burlington, Iowa, 

 spinobrachiatus, Hall, 1860. Geol. Iowa, Sup. to vol. i., p. 6. — 



Enc. — Burlington, Iowa, 

 spinotentaculus, Hall, 1860. Geol. Iowa, Sup. to vol. i., p. 86. — 



Enc. — Burlington, Iowa, 

 spinulosus, Hall, 1860. Geol. Iowa, Sup. to vol. i., p. 52. — Arch. 



— Nauvoo, Illinois, 

 steropes, Hall, 1860. Geol. Iowa, Sup. to vol. i., p. 43. — Arch. — 



Bluffs of Mississippi, opposite Keokuk, 

 subaculeatus, Hall, 1858. Geol. Iowa, vol. i., p. 570, pi. 10, fig. 



2. — Enc. — Burlington, Iowa, 

 suboequalis, McChesney, 1860. New Pal. Fossils, p. 17, pi. v,, 



fig. 7. (Compare A. verrucosus, Hall.) — Enc. — Monmouth, 



Illinois. 

 (Amphoracrinus) subturbinatus, Meek and Worthen, Sept., 1860. 



Proc. Acad. Nat. Sci. Pbilad., p. 388.— Enc— Burlington, 



Iowa, 

 subumbrosus, Hall, 1860. Geol. Iowa, Sup. to vol. i. — Enc. — 



Burlington, Iowa. 



subventricosus, v. A. ventricosus. 



superlatus, Hall, 1858. Geol. Iowa, vol. i., p. 573, fig. 82. — Enc. 

 — Burlington, Iowa. 



symmetricus, Hall, 1858. Geol. Iowa, vol. i., 575, pi. 10, fig. 8. — 



Enc. — Burlington, Iowa. 

 (?) tenuidiscus, Hall, Feb., 1861. Des. New Crinoidea, Prelim. 



Not., p. 14. — Enc. — Burlington, Iowa. 



