844 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



MTELODACTTLUS Hall. Genotype: M. con volutus Hall . 



Myelodactylus Hall, Pal. New York, 2, 1852, p. 191.— Angelin, Icon. Crinoid. Suec, 

 1878, p. 11.— Zittel, Handb. Pal., 1, 1879, p. 354.— Wachsmuth and Springer, 

 Proc. Acad. Nat. Sci. Philadelphia, 1879, p. 369 (Rev. Pal., pt. 1, p. 146).— 

 Miller, Jour. Cincinnati Soc. Nat. Hist., 3, 1880, p. 142.— Nicholson and 

 Etheridge, Mon. Sil. Foss. Girvan Dist., 1880, p. 330.— Miller, N. A. Geol. 

 Pal., 1889, p. 262; 2d App., 1897, p. 749.— Weller, Bull. Chicago Acad. Sci., 

 Nat. Hist. Surv., 4, pt. 1, 1900, p. 45, 68.— Wachsmuth, Zittel-Eastman 

 Textb. Pal., 1, 1900, p. 153. 

 Herpetocrinus Salter, Cat. Camb. and Sil. Foss., 1873, p. 118. — Nicholson and 

 Etheridge, Mon. Sil. Foss. Girvan Dist., 1880, p. 331.— Bather, Kongl. Sv. 

 Vet. Akad. Handl., 25, No. 2, 1893, pp. 21, 36, pis. 1, 2, figs. 24-7S; fig. 12; 

 Amer. Geol., 16, 1895, p. 214; Nat. Sci., 12, 1898, p. 339; Treatise on Zool., pt. 

 3, Echinoderma, London, 1900, p. 146, fig. 49. — Zittel, Grundzuge Pal., 1, 

 1910, p. 151.— Springer, Zittel-Eastman Textb. Pal., 1, 1913, p. 212. (Geno- 

 type: H. fletcheri Salter). 



Myelodactylus brachiatus Hall. 



Myelodactylus brachiatus Hall, Pal. New York, 2, 1852, p. 232, pi. 45, figs. 7a-e. 

 Clinton (Rochester): Lockport, New York. 



Myelodactylus bridgeportensis Miller. 



Myelodactylus bridgeportensis Miller, Jour. Cincinnati Soc. Nat. Hist., 3, 1880, 

 p. 141, pi. 4, figs. 2, 2a-c; N. A. Geol. Pal., 1889, p. 262, fig. 368.— Weller, 

 Bull. Chicago Acad. Sci., Nat. Hist. Surv., 4, pt. 1, 1900, p. 69, pi. 15, figs. 1-2. 



Niagaran (Racine) : Bridgeport, Illinois. 



Myelodactylus convolutus Hall. 



Myelodactylus convolutus Hall, Pal. New York, 2, 1852, p. 193, pi. 42, figs. 5a, b; 

 6a-h. — Nicholson and Etheridge, Mon. Sil. Foss. Girvan Dist., 1880, p. 331. 

 Clinton (Rochester): Lockport, New York. 



Myelodactylus gorbyi Miller. 



Myelodactylus gorbyi Miller, 17th Ann. Rep. Indiana Dep. Geol. Nat. Res., 1892, 

 p. 682, pi. 11, figs. 6, 7 (adv. sheets, 1891, p. 72); N. A. Geol. Pal., 2d. App., 

 1897, p. 749, fig. 1365. 

 Niagaran (Waldron): Near Nashville (Newsom), Tennessee. 



MYRIANITES MacLeay. Genotype: M. macleaii Murchisun. 



Myrianites MacLeay, Murchison's Sil. Syst., p. 700; Ann. Nat. Hist., 4 1840, 

 p. 387.— Richter, Zeits. d. d. geol. Gesell., 1, 1849, p. 457; ibid., 5, 1853, 

 450. — McCoy, British Pal. Rocka aud Foss., 1854, p. 129. — Nicholson and 

 Etheridge, Mon. Sil. Foss. Girvan Dist., 1880, p. 305.— Miller, N. A. Geol. 

 Pal., 1889, p. 519. 



Myrianites murchisoni Emmons. 



Myrianites murchisoni Emmons, Nat. Hist. New York Agric, 1, 1846, p. 69, pi. 



16, fig. 1. 

 Ordovician(?): Waterville, Maine. 



Myrianites sillimanl Emmons. 



Myrianites silliniani Emmons, Nat. Hist. New York Agric, 1, 1846, p. 69, pi. 16, 



fig. 5. 

 Ordovician(?): Waterville, Maine. 



