BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 427 



Dlctyonema spencer! Gurley. 



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



pp. 36, 37, pi. 4, fig. 1, text fig. 46. 

 Niagaran dolomite: Hamilton, Ontario. 



Dictyonema spiniferum Ruedemann. 



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



p. 151, pi. 1, fig. 4, text figs. 55, 56. 

 (hazyan (Normanskill) : Glenmont, Albany County, New York. 



tyoneina splendens Billings. 

 Dictyonema splendens Billings, Pal. Foss., Geol. Surv. Canada, 2, pt. 1, 1874, p. 



12, fig. 2, 2a. Spencer, Bull. Mus. Univ. State Missouri, 1, 1884, p. 27; 



Trans. Acad. Sci. St. Louis, 4, 1884, p. 577. Foerste, Bull. Sci. Lab. Denison 



Univ., 2, pt. 1, 1887, p. 108. 



Dictyonema cf. splendens Clarke, Mem. New York State Mus., 3, 1900, p. 64. 

 Silurian or Helderbergian : Between Cape Gaspe and Cape Rosier, Canada. 



'tyouema stenactinotum Gurley. 

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



pp. 30, 31, pi. 3, fig. 2, text fig. 34. 

 Niagaran dolomite: Hamilton, Ontario. 



Dictyonema subretlforme (Spencer). 



Calyptograptus subretiformis Spencer, Canadian Nat., n. s., 8, 1880, pp. 458, 460; 

 'ibid., 10, 1882, p. 165; Bull. Mus. Univ. State Missouri, 1, 1884, p. 28, pi. 4, 

 fig. 1 (not fig. 2); Trans. Acad. Sci. St. Louis, 4, 1884, p. 578, pi. 4, fig. 1 (not 

 fig. 2). Gurley, Jour. Geol., 4, 1896, pp. 93, 308. 



Dictyonema subretiforme Ruedemann, Mem. New York State Mus., 11, 1908, p. 

 162, pi. 2, figs. 1, 2. Bassler, Bull. U. S. Nat. Mus., 65, 1909, pp. 26-28, figs. 

 30,31. 

 Niagaran: Hamilton, Ontario; Middleport, New York (Rochester). 



DICTYONEMA TENELLUM Spencer (part). See Dictyonema polymorphum. 



Dictyonema tenelluin Spencer. 



Dictyonema tenellum Spencer, Canadian Nat., n. s., 8, 1878, pp. 458, 459; ibid., 



10, 1882, p. 165; Trans. Acad. Sci. St. Louis, 4, 1884, pp. 564, 576 (not pi. 1, 



fig. 13); Bull. Mus. Univ. State Missouri, 1, 1884, pp. 14, 26 (not pi. 1, fig. 



13). Miller, N. A. Geol. Pal., 1889, p. 185. Gurley, Jour. Geol., 4, 1896, pp. 



96, 308. Bassler, Bull. U. S. Nat. Mus., 65, 1909, pp. 28-30, pi. 2, fig. 4, text 



figs. 32, 33. 

 Niagaran dolomite: Hamilton, Ontario. 



Dictyonema websteri Dawson. 



Dictyonema websteri Dawson, Acadian Geol., Suppl. Chap., 1860, p. 60, fig. 46; 

 ibid., 2d ed., 1868, p. 563, fig. 196; Canadian Nat. Geol., 5, 1860, p. 139, fig. 2 

 Hall, 20th Rep. New York State Cab. Nat. Hist., 1868, p. 225. Spencer, Trans. 

 Acad. Sci. St. Louis, 4, 1884, p. 576; Bull. Mus. Univ. State Missouri, 1, 1884, 

 p. 26. Ruedemann, Proc. and Trans. Nova Scotian Inst. Sci., 11, pt, 4, 1908, 

 p. xlvii. 

 Silurian: Kings County, Nova Scotia. 



DICTYOPHYTON BECKi Miller. See Lithodictuon becki. 



Dictyophytra Rauff. Not recognized. 



Dictyophytra (? in place of Dictyophyton) Rauff, Palaeontographica, 40, 1894, 



p. 249. 



Observation. Dictyophytra was proposed by Rauff probably to replace Dicty- 

 ophyton, but its description was not given. 



