286 PROCEEDINGS OP THE AMERICAN ACADEMY 



A. VERRUCOSUS, Hall, Iowa, Vol. 1, p. 578, PI. 10, fig. 7, a, b. Sub- 

 carboniferous. Probably a younger specimen of A.pernodosus. 



A. Verneuilianus, B. F. Shumard, Geol. Survey of Missouri, 

 Part 2, p. 193, PI. A, fig. 1, a, b. Subcarboniferous. En- 

 crinital limestone. 



A. Yandelli, B. F. Shumard, Trans. Acad. Sci. St. Louis, 1857, 

 Vol. 1, No. 1, p. 76. Actinocrinites, Yandell and Shumard, 

 Contributions, p. 24, fig. 5, a, b. Subcarboniferous. Button- 

 Mould Knob, Kentucky. 



AGARICOCRINITES, Troost, MSS. (Sub-genus of Actinocrinus, 

 Hall, 1858.) 



A. BULLATUS, Hall, Iowa, Vol. 1, p. 562, PI. 9, fig. 11, a, b. Sub- 

 carboniferous. Burlington limestone. 



A. STELLATUS, Hall, lowa, Vol. 1, p. 564. Subcarboniferous. 

 Burlington limestone. 



A. TUBEROsus, Hall, Iowa, Vol. 1, p. 617, PI. 16, fig. 2, a, b, c. 

 A. tuberosus, Troost, MSS., Cat. Amphoracrinus Atneri- 

 canus? Rocmer, in Bronn, Lethea, Vol. 11, p. 50, PI. 4, fig. 

 15, a, b. Subcarboniferous. Keokuk limestone ; Warsaw 

 limestone, White's Creek, Tennessee. 



A. Whitfieldi, Hall, Iowa, Vol. 1, p. 621. Subcarboniferous. 

 Keokuk limestone. 



A. WoRTHENi, Hall, Iowa, Vol. 1, p. 619, PI. 16, fig. 1. Subcar- 

 boniferous. Keokuk and Warsaw limestone. 



AGASSIZOCRINUS, Troost, MSS.; Hall, 185.8, Iowa, Vol. 1, 

 p. 684. 



A. CONICUS, Hall, Iowa, Vol. 1, p. 687. Astylocrinus Icevis, F. 

 Roemer, See Owen and Shumard, Rep. Wisconsin, Iowa, and 

 Missouri, p. 597, PI. 5, fig. 6. Subcarboniferous. This fossil 

 has a wide range : it extends from Iowa to Tennessee. 



A. CONSTRICTUS, Hall, Iowa, Vol. 1, p. 687, PI. 25, fig. 10. Sub- 

 carboniferous. Kaskaskia limestone. 



A. DACTYLiFORMis, Hall, lowa, Vol. 1, p. 685 ; Troost, MSS. ; Shu- 

 mard, Red River of Louisiana, p. 199. Subcarboniferous. 

 Kaskaskia limestone. 



A. GIBBOSUS, Hall, Iowa, Vol. 1, p. 686, PI. 25, fig. 6, and 6, b. 

 Subcarboniferous. Kaskaskia limestone. 



