284 PROCEEDINGS OF THE AMERICAN ACADEMY 



A. (Bato) irregularis, Casseday, Zeitschrift der Deutschen 

 Geol. Gesell., p. 240, PI. 2, fig. 2, a - c. Subcarboniferous. 

 Spurgen Hill, Iowa. 



A. KoNiNCKi, Shiimard, Geol. Survey of Missouri, Part 2, p. 194, 

 PI. A, fig. 8, a — c. Subcarboniferous. Encrinital limestone. 



A. LONGiROSTRis, Hall, Vol. 1, p. 589, PL 2, fig. 2, a, b, 4, c, d. 

 Subcarboniferous. Burlington limestone. 



A. LowEi, Hall, Iowa, Vol. 1, p. 611, PI. 15, fig. 5, a, b. Subcar- 

 boniferous. Keokuk limestone. 



A. MINOR, Hall, Iowa, Vol. 1, p. 573, non icon. Subcarboniferous. 

 Burlington limestone. 



A. MissouRiENSis, B. F. Shumard, Geol. of Missouri, Part 2, 

 p. 190, PI. A, fig. 4, a-c. Subcarboniferous. Encrinital 

 limestone. 



A. MULTiRADiATUS, B. F. Shumard, Trans, Acad. Sci. St. Louis, 

 1857 - 8, Vol. 1, No. 1, p. 75, PL 1, fig. 5. A. multiradiatus, 

 Hall, Iowa, Vol. 1, p. 579, PL 10, fig. 9. Subcarboniferous. 

 Burlington limestone. 



A. MULTiBRACHiATUS, Hall, lowa. Vol. 1, p. 580, PL 10, fig. 10. 

 Suhcarboniferoiis. Burlington limestone. 



A. (DoRTCRiNUs) MississiPPiENSis, Roemer, Ai'chiv fur natur- 

 geschichte. Von Troschel, Jahrgang XIX., Bd. 1, 1853. Sub- 

 carboniferous. His genus was based merely upon the re- 

 markably long thorns which protrude from the upper surface. 



A. Nashvilli^, Hall, Iowa, Vol, 1, p. 609, PL 15, fig, 4; PL 16, 

 fig. 4, a, b ; Troost, Monograph, MSS, Subcarboniferous. 

 Keokuk limestone ; White's Creek, Tennessee. 



A. ORNATUS, Hall, Iowa, Vol. 1, p. 583, PL 10, fig. 12, Subcar- 

 boniferous. Burlington limestone. 



A. PARVUS, B, F, Shumard, Geol. Survey of Missouri, Part 2, 

 p. 193, PL A, fig. 9, Subcarboniferous. St. Louis limestone. 



A. PENTAGONUS, Hall, lowa, VoL 1, p. 579, PL 10, fig. 6, a, b. 

 Subcarboniferous. Burlington limestone. 



A. PERNODOSUS, Hall, Iowa, Vol. 1, pp. 608, 617. PL 15, fig. 3, a, 

 b ; PL 16, fig. 7. Subcarboniferous. An adult specimen of 

 A. verrucosus, Hall, 



A. PERNODOSUS, var,. Hall, Iowa, Vol, 1, p. 617, PL 16, fig, 7, 

 Subcarboniferous. Keokuk limestone. 



A, PLUMOSUS, Vide Glyptocrinus plumosus. 



