1024 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



POROCRINUS Continued. 



Eastman Textb. Pal., 1, 1900, p. 184. Bather, Treatise on Zool., pt. 3, 

 Echinoderma, London, 1900, p. 172, fig. 86. Grabau and Shimer, N. A. Index 

 Fossils, 2, 1910, p. 473. Springer, Zittel-Eastman Textb., Pal., 2d ed., 

 1913, p. 217. 



Porocrinus conicus Billings. 



Porocrinus conicus Billings, Geol. Surv. Canada, Rep. Progr. for 1853-56, 1857, 

 p. 279; Geol. Surv. Canada, dec. 4, 1859, p. 34, pi. 2, figs. 5a-d. Zittel, 

 Handb. Pal., 1, Munich, 1879, p. 420, fig. 296a. Miller, N. A. Geol. Pal., 

 1889, p. 273, fig. 400. Grabau and Shimer, N. A. Index Fossils, 2, 1910, p. 

 474. Springer, Geol. Surv. Canada, Mem. 15P, 1911, p. 41 (loc. occ.). 

 Trenton (Curdsville): Ottawa and Kirkfield, Ontario. 



Porocrinus crassus Meek and Worthen. 



Porocrinus crassus Meek and Worthen, Proc. Acad. Nat. Sci. Philadelphia, 1865, 



p. 145; Geol. Surv. Illinois, 3, 1868, p. 330, figs. A, B, pi. 4, figs. 2a, b. Miller, 



N. A. Geol. Pal., 1889, p. 273, figs. 401, 402. 

 Richmond (Maquoketa) : Oswego, Kendall County, Illinois. 



Porocrinus kentuckiensis Miller and Gurley. 



Porocrinus kentuckiensis Miller and Gurley, Bull. Illinois State Mus. Nat. Hist., 



5, 1894, p. 24, pi. 2, fig. 19. Miller, N. A. Geol. Pal., 2d App., 1897, p. 751, 



fig. 1380. 

 Trenton (Curdsville): Mercer County, Kentucky. 



Porocrinus pentagonius Meek and Worthen. 



Porocrinus pentagonius Meek and Worthen, Proc. Acad. Nat. Sci. Philadelphia, 



1865, p. 146; Geol. Surv. Illinois, 3, 1868, p. 332, pi. 1, fig. 3. 

 Black River (Platteville): Dixon, Illinois. 



Porocrinus shawi Schuchert. 



Porocrinus shawi Schuchert, Proc. U. S. Nat. Mus., 22, 1900, p. 155, pi. 12, 



figs. 1-3. 



Mohawkian: Head of Frobisher Bay, Baffin Land. 

 Holotype.Cat. No. 28145, U.S.N.M. 



Porocrinus smithi Grant. 



Porocrinua Smithi Grant, Trans. Ottawa Field Nat. Club, 1, 1881, p. 42, pi. figs. 



1-8. Bather, Treatise on Zool., pt. 3, Echinoderma, London, 1900, p. 173, 



fig. 86. 

 Trenton: Belleville, Ontario. 



POSIDONIA ALATA Hall. See Cyrtodonta? alata. 

 POSIDONOMYA ALATA Miller. See Cyrtodonta? alata. 

 POSIDONOMYA AMYGDALiNA Emmons. See Ambonychia amygdalina. 

 POSIDONOMYA BELLISTRIATA Emmons. See Ambonychia bellistriata. 

 POSIDONOMYA OBTUSA Emmoiis. See Cyrtodonta obtusa. 

 POSIDONOMYA ORBICULARIS Emmons. See Ambonychia orbicularia. 

 POSIDONOMYA? RHOMBOIDEA Hall. See Pterinopecten? rhomboideum. 

 POSIDONOMYA SUBUNDATA Emmons. See Clionychia undata. 



