2 BULLETIN '.)2, UNITED STATES NATIONAL MUSEUM. 



ACANTHODICTTA Hinde. Genotype: A. hispida Hinde. 



Acanthodictya Hinde, Trans. Roy. Soc. Canada, 7, sec. 4, 1890, p. 47.— Miller, 

 N. A. Geol. Pal., 1st App., 1892, p. 666.— Dawson, Trans. Roy. Soc. Canada, 

 2d ser., 2, sec. 4, 1896, p. 110. 



Acanthodictya hispida Hinde. 



Acanthodictya hispida Hinde, Trans. Roy. Soc. Canada, 7, sec. 4, 1890, p. 48, 

 figs. 18, 19, pi. 3, fig. 8.— Rautf, Palseontographia, 40, 1894, p. 255.— Dawson, 

 Trans. Roy. Soc. Canada, 2d ser., 2, sec. 4, 1896, p. 110, figs. 20, 21, pi. 3, 

 fig. 11. 



Cajiadian? (Levis?): Metis, Quebec. 



ACANTHOGRAPTUS Spencer. Genotype: A. granti Spencer. 



Acanthograptus Spencer, Canadian Nat., n. s. 8, 1878, p. 461.— Lapworth Quart. 

 Jour. Geol. Soc. London, 37, 1881, p. 174.— Spencer, Trans. Acad. Sci. St. 

 Louis, 4, 1884, pp. 562, 581; Bull. Mus. Univ. State Missouri, 1, 1884, p. 31.— 

 Miller, N. A. Geol. Pal., 1889, p. 170.— Ruedemann, Mem. New York State 

 Mus., 9, 1908, p. 191. 



AcANTHOfiRAPTUS BARTONENSis Grant. See Acanthograptus walkeri. 



Acanthograptus chsetophorus Gurley. 



Acanthograptus chtetophorus (Gurley MS.) Bassler, Bull. U. S. Nat. Mus., 65, 



1911, p. 61, fig. 84, pi. 3, fig. 5. 

 Niagaran dolomite: Hamilton, Ontario. 



Acanthograptus granti Spencer. 



Acanthograptus granti Spencer, Canadian Nat., n. s., 8, 1878, p. 461; 10, 1882, p. 



165; Bull. Mus. Univ. State Missouri, 1, 1884, p. 31, pi. 4, fig. 5; Trans. Acad. 



Sci. St. Louis, 4, 1884, p. 581, pi. 4, fig. 5.— Gurley, Jour. Geol., 4, 1896, pp. 



92, 308.— Ruedemann, Mem. New York State Mus., 11 pt. 2, 1908, pi. 6, 



fig. 3; pi. 7, fig. 3.— Bassler, Bull. U. S. Nat. Mus., 65, 1909, pp. 56, 57, figs. 



72-74. 

 Niagaran dolomite: Hamilton, Ontario. 



Acanthograptus multlspinus Gurley. 



Acanthograptus multispinus (Gurley MS.), Bassler, Bull. U. S. Nat. Mus., 65, 



1911,p. 61, figs. 85, 86. 

 Niagaran dolomite: Hamilton, Ontario. 



Acanthograptus pulcher Spencer. 



Acanthograptus pulcher Spencer, Canadian Nat., 10, 1882, p. 165 (nom. nud.); 

 Bull. Mus. Univ. State Missouri, 1, 1884, p. 32, pi. 4, fig. 6; Trans. Acad. 

 Sci. St. Louis, 4, 1884, pp. 564, 582, pi. 4, fig. 6.— Miller, N. A. Geol. Pal., 

 1889, p. 170, fig. 128.— Gurley, Jour. Geol. 4, 1896, pp. 92, 308.— Bassler, 

 Bull. U. S. Nat. Mus., 65, 1909, pp. 59, 60, figs. 81-83, pi. 4, fig. 5. 



Niagaran dolomite: Hamilton, Ontario. 



Acanthograptus walkeri (Spencer). 



Inocaulis walkeri Spencer, Canadian Nat., 10, 1882, p. 165 (nom. nud.); Bull. 



Mus. Univ. State Missouri, 1, 1884, p. 35, pi. 5, fig. 2; Trans. Acad. Sci. St. 



Louis, 4, 1884, p. 585, pi. 5, fig. 2.— Gurley, Jour. Geol., 4, 1896, pp. 99, 309. 

 Acanthograptus walkeri Ruedemann, Mem. New York State Mus., 11, 1908, p. 194, 



figs. 97, 98, pi. 6, figs. 1. 2; pi. 7, fig. 4.— Bassler, Bull. U. S. Nat. Mus., 65, 1909, 



pp. 57-59, fig8. 75-80. 

 Acanthogrnptus bartonensis Grant, Jour, and Proc. Hamilton Assoc, 16, 1900, 



p. 101 (fig. only). 



