294 PKOCEEDINGS OF THE AMERICAN ACADEMY 



LECANOCRINUS, Hall, 1852. 



L, CALicuLUS, Hall, Palceont. N. York, Vol. 2, p. 203, PI. 46, 



fig. 3, a, b. Silurian. Niagara group. 

 L. MACROPETALUS, Hall, Paljeont. N. York, Vol. 2, p. 199, PI. 45, 



fig. l,a-h. Silurian. Niagara group. 

 L. ORNATUS, Hall, Palfcont. N. York, Vol. 2, p. 201, PI. 44, fig. 2, 



a - m. Silurian, Niagara group. 

 L. SIMPLEX, Hall, Palieont. N. York, Vol. 2, p. 202, PI. 46, fig. 2, 



a - e. Silurian. Niagara group. 



LEPOCRINITES, Mather, 1830. 



L. Gebhardi, Mather, Geol. N. York, p. 347. Silurian. Pen- 

 tamerus limestone. 



LYRIOCRINUS, Hall, 1852. 



L. DACTYLus, Hall, PaliEont. N. York, Vol. 2, p. 197, PL 44, fig. 1, 

 a — g. Marsupiocrinites dactylus, Hall, Geol. Rep. 4th Dist., 

 p. 114, fig. 4, p. 113, 1843. Silurian. Niagara group. 



MACROSTYLOCRINUS, Hall, 1852. 



M. ORNATUS, Hall, Pala^ont. N. York, Vol. 2, p. 201, PI. 46, fig. 4, 

 a - g. Silurian. Niagara group. 



MALOCYSTITES, BilHngs, 1858. 



M. Bawandi, Billings, Geol. Survey of Canada, Palaiont., Dec. 



III. p. 66, PI. 7, fig. 1, a - i. Silurian. Chazy limestone. 

 M. Mdrchisoni, Billings, 1. c. p. 67, PI. 7, fig. 2, a - c. Silurian. 

 Chazy limestone. 



MARSUPIOCRINITES. Vide Lyriocrinus. 



MEGISTOCRINUS, Owen and Shumard, 1852. Hall, Iowa, Vol. 2, 

 p. 479, makes it a subgenus of Actinocrinus. "We doubt if 

 it is a subcarboniferous fossil. 



M. EvANSi, Owen and Shumard, Journ. Acad. Nat. Sci. Philad., 

 Vol. 2, Part 1, p. 68 ; Geol. Survey of Wisconsin, Iowa, and 

 Minnesota, 1852, p. 594, PI. 5 A, fig. 3, a, b. Subcarbon- 

 iferous (?). 



M. LATUS, Hall, Iowa, Vol. 1, p. 480, PI. 1, fig. 1, a, b. Devonian. 

 Hamilton group. 



MELOCRINITES, Goldfuss (Agas.), 1834. 



M. scuLPTus, Hall, Pateont. N. York, Vol. 2, p. 228, PI. 49 A, 

 fig. 2, a- d. Silurian. Niagara group. 



