422 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



DICTYONEMA Continued. 



Buffalo Soc. Nat. Sci., 6, 1899, p. 119; ibid, 7, 1901, p. 133; Bull. New York 

 State Mus., 45, 1901, p. 133. Ruedemann, Mem. New York State Mus., 7, 

 pt. 1, 1904, pp. 591, 592. Grabau and Shimer, N. A. Index Fossils, 1, 1906, 

 p. 24. Ruedemann, Zittel-Eastman Textb. Pal., 2d ed., 1913, p. 128. 

 Dictyograptus Hopkinson, Quart. Jour. Geol. Soc. London, 31, 1875, p. 667. 

 Moberg, Geol. Foren. Stockholm Forhandl., 16, 1894, p. 236. Tornquist, 

 ibid., 16, 1894, p. 380. 



Dictyonema arbusculum (Ulrich). 



Dictyonema irregularis James (not Hall), Paleontologist, 3, 1879, p. 22. 

 Dictyograptus reticulatus Ulrich, Cat. Foss. Cincinnati group, 1880, p. 61 (nom. 



nud.). 

 Inocaulis arbuscula Ulrich, Cincinnati Soc. Nat. Hist. Jour., 2, 1879, p. 28, pi. 7, 



figs. 27, 27a. Gurley, Jour. Geol., 4, 1896, p. 300. 

 Calyptograptus? arbusculus Spencer, Acad. Sci. St. Louis Trans., 4, 1884, p. 563, 



footnote (gen. ref.). 

 Dictyonema arbusculum Gurley, in J. F. James, Cincinnati Soc. Nat. Hist. Jour., 



1892, p. 153, 16, pt. 2. Nickles, ibid., 20, 1902, p. 72. Ruedemann, Mem. 



New York State Mus., 11, pt. 2, 1908, pp. 151-153, figs. 57, 58; Bull. New 



York State Mus., 162, 1912, p. 77, pi. 2, fig. 15. 

 Eden: Covington, Kentucky, and vicinity (Southgate); Indian Ladder, New 



York (Indian Ladder). 

 Holotype and plesiotype.C&t. Nos. 54288, 54289, U.S.N.M. 



Dictyonema areyi Gurley. 



Dictyonema areyi (Gurley MS.) Ruedemann, Mem. New York State Mus., 11, 



1908, p. 164, pi. 4, fig. 2; text fig. 73. 

 Clinton (Rochester): Rochester, New York. 



Dictyonema canadense (Whiteaves). 



Inocaulis Canadensis Whit-eaves, Pal. Foss. Geol. Surv. Canada, 3, pt. 3, 1897, p. 



149, pi. 17, fig. 4. 

 Dictyonema canadensis Ruedemann, Mem. New York State Mus., 11, pt. 2, 1908, 



p. 131 (gen. ref.). 

 Black River or Richmond: Inmost Island, Lake Winnipeg, Canada. 



DICTYONEMA (DESMOGRAPTUS) CANCELLATUM Ruedemann. See DesmograptiivS 

 cancellatus. 



Dictyonema crassibasale Gurley. 



Dictyonema gracilis Spencer (not Hall), Canadian Nat., 8, 1878, p. 458; ibid., 10, 



1882, p. 165; Trans. Acad. Sci. St. Louis, 4, 1884, pp. 573, 574, pi. 2, figs. 



2, 3; Bull. Mus. Univ. State Missouri, 1, 1884, p. 24, pi. 2, figs. 2, 2a, 3. 

 Dictyonema crassibasale (Gurley MS.) Bassler, Bull. U. S. Nat. Mus., 65, 1909, 



pp. 19-24, pi. 3, fig. 1; text figs. 21-25. 

 Niagaran dolomite: Hamilton, Ontario. 



DICTYONEMA DELICATULUM Dawson. See Dictyonema perexile. 



Dictyonema desmoides Gurley. 



Dictyonema desmoides (Gurley MS.) Bassler, Bull. U. S. Nat. Mus., 65, 1909, 



pp. 34, 35, pi. 4, fig. 3; text figs. 41-43. 

 Niagaran dolomite: Hamilton, Ontario. 



