426 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Dictyonema polymorphum Continued. 



Calyptograptus subretiformis Spencer (part), Trans. Acad. Sci. St. Louis, 4, 1884 ? 

 pi. 4, fig. 2; Bull. Mus. Univ. State Missouri, 1, 1884, pi. 4, fig. 2. 



Dictyonema polymorphum (Gurley MS.) Ruedemann, Mem. New York State 

 Mus., 11, 1908, p. 158, pi. 2, fig. 3; pi. 3, figs. 4, 5, 6; p. 160, figs. 60-72. 

 Bassler, Bull. U. S. Nat. Mus., No. 65, 1909, p. 24, pi. 4, fig.ll. 



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



Holotype.Ca,t. No. 54278, U.S.N.M. 



Dictyoneina quadrangulare (Hall). 



Dictyonema quadrangularis Hall, Geol. Surv. Canada, dec. 2, 1865, p. 138, pi. 20, 



fig. 5. Matthew, Trans. Royal Soc. Canada, 10, sec. 4, 1893, p. 96. 

 Canadian: Point Levis, Quebec (Levis, Clonograptus zone); St. John, New 

 Brunswick (Bretonian Div. C3d). 



Dictyonema rectilineatum Buedemanu. 



Dictyonema n. sp. Ruedemann, New York State Pal. Ann. Rep., 1902, p. 570. 

 Dictyonema rectilineatum Ruedemann, Mem. New York State Mus., 7, pt. 1, 



1904, pp. 607-609, pi. 3, figs. 9, 10, text fig. 29. 

 Canadian: Deepkill, Rensselaer County, New York (Deepkill, Diplograptus 



dentatus zone); Point Levis, Quebec (Levis, dentatus zone). 



Dictyonema retlforme (Hall). 



Gorgonia? reteformis Hall, Rep. Surv. 4th Geol. Dist. New York, 1843, p. 115, 

 fig. 1. Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 1889, p. 260, figs. 



Dictyonema retiformis Hall, Pal. New York, 2, 1852, p. 174, pi. 40F, fig. la, b. 

 Lincklaen, 14th Rep. New York State Cab. Nat. Hist., 1861, p. 55, pi. 7, 

 fig. 1. Hall, Geol. Surv. Canada, dec. 2, 1865, p. 12, fig. 10; 20th Rep. New 

 York State Cab. Hist., 1868, p. 178, fig. 11; rev. ed., 1870, p. 210, fig. 11; p. 

 225. Nicholson, Mon. British Grapt., 1872, p. 129, fig. 69. Zittel, Handb. 

 Pal., 1, 1879, p. 289, fig. 195. Spencer, Bull. Mus. Univ. State Missouri, 

 1, 1884, p. 14, 23, 24, pi. 3, figs. 1, la, 2, 2a; Trans. Acad. Sci. St. Louis, 4, 1884, 

 p. 573, pi. 3, fig. 1, 2. Miller, N. A. Geol. Pal., 1889, p. 185, text fig. 168. 

 Pocta, Syst. Sil. Centre Boheme, 8, 1894, p. 192, 193. Gurley, Jour. Geol., 4, 

 1896, pp. 96, 308. Roemer and Freeh, Leth. geog., 1 Theil, Leth. Pal., 1, 3 

 Lief., 1897, p. 575, fig. 145. Grabau, Bull. Buffalo Soc. Nat. Sci., 7, 1901, p. 

 133, fig. 27; Bull. New York State Mus., 45, 1901, pp. 133, 134, fig. 27. 

 Grabau and Shimer, N. A. Index Fossils, 1, 1906, p. 25, fig. 33. Ruedemann, 

 Mem. New York State Mus., 11, 1908, p. 155, fig. 64, pi. 3. fig. 1. Basal* 

 Bull. U. S. Nat. Mus., 65, 1909, pp. 18, 19, figs. 19, 20. 



Clinton (Rochester) : Rochester, Lockport, etc., New York; Hamilton. Ontario. 



Dictyonema robustum Hall. 



Dictyonema robusta Hall, Geol. Surv. Canada, dec. 2, 1865, p. 137. pi. 20, figs. 3, 

 Canadian (Levis, Clonograptus zone): Point Levis, Quebec. 



Dictyonema scalariforme Foerste. 



Dictyonema scalariforme Foerste, Bull. Sci. Lab. Denison Univ., 2, pt. 1, 1887, 

 108, pi. 8, figs. 28, 29; Geol. Surv. Ohio, Pal., 7, 1893, p. 600, pi. 27, figs. 

 29. Gurley, Jour. Geol., 4, 1896, p. 308. Ruedemann, Mem. New Yc 

 State Mus., 11, pt. 2, 1908, p. 153, pi. 1, fig. 3, text figs. 61-63. 



Upper Medinan (Brassfield): Soldiers Home, Dayton, Ohio. 



Clinton shale: Near Clinton, New York. 



DICTYONEMA SOCIALE Salter. See Dictyonema flabelliforme. 



