400 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Dendrograptus fruticosus Hall. 



Dendrograptus fruticosus Hall, Geol. Surv. Canada, dec. 2, 1865, p. 131, pi. 17, 



figs. 8, 9. 

 Canadian (Levis, Didymograptus dentatus zone): Point Levis, Quebec. 



Dendrograptus gracilis Hall. 



Dendrograptus gracilis Hall, Geol. Surv. Canada, dec. 2, 1865, p. 132, pi. 18, 



figs. 5-6; 20th Rep. New York State Cab. Nat. Hist., 1868, p. 199, pi. 4, fig. 



11; rev. ed., 1870, p. 230, pi. 4, fig. 11; p. 224. 

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



DENDROGRAPTUS cf. GRACILIS Buedemann. See Dendrograptus flexuosus. 

 DENDROGRAPTUS GRACIUS var. CRASSA James. See Buthotrephis gracilis crassa. 



DENDROGRAPTUS (PSILOPHYTON) GRACILLIMUS "Walcott. See Mastigograptus gracil- 

 limus. 



DENDROGRAPTUS GRACILLIMUS var. INTERMEDIA James. See Buthotrephis gracilis 

 intermedia. 



DENDROGRAPTUS LINEARIS Carruthers. See Pleurograptus linearis. 

 DENDROGRAPTUS NOVELLUS Hall. See Chaunograptus novellus. 



Dendrograptus ontarioensls Bassler. 



Dendrograptus ontarioensis Bassler, Bull. U. S. Nat. Mus., 65, 1909, pp. 12, 13, 



pi. 1, fig. 4, fig. 12. 

 Niagaran dolomite: Hamilton, Ontario. 



Dendrograptus phainotheca Gurley. 



Dendrograptus phainotheca (Gurley MS.) Bassler, Bull. U. S. Nat. Mus., 65, 



1909, pp. 11, 12, pi. 2, fig. 2; fig. 11. 

 Niagaran dolomite: Hamilton, Ontario. 



Dendrograptus prsegracilis Spencer, 



Dendrograptus praegracilis Spencer, Canadian Nat., 10, 1882, p. 165 (nom. mid.); 



Trans. Acad. Sci. St. Louis, 4, 1884, p. 569, pi. 1, fig. 7; Bull. Mus. Univ. 



State Missouri, 1, 1884, p. 19, pi. 1, fig. 7. Gurley, Jour. Geol., 4, 1896, pp. 



95-308. Bassler, Bull. U. S. Nat. Mus., 65, 1909, p. 9, pi. 2, fig. 3, text 



figs. 4, 10. 

 Niagaran dolomite: Hamilton, Ontario. 



Dendrograptus? problematicus (Spencer). 



Inocaulis(?) problematica Spencer, Canadian Nat., n. s., 8, 1878, p. 458; ibid., 



10, 1882, p. 165; Bull. Mus. Univ. State Missouri, 1, 1884, pp. 14, 36, pi. 5, 



fig. 3; Trans. Acad. Sci. St. Louis, 4, 1884, p. 564, pi. 5, fig. 3. Gurley, 



Jour. Geol., 4, 1896, pp. 99, 309. 

 Dendrograptus? problematicus Bassler, Bull. U. S. Nat. Mus., 65, 1909, p. 10, 



pi. l,figs. 1, 2, text fig. 6. 



Dendrograptus sp. Grant, Jour. Proc. Hamilton Assoc., 16, 1900, p. 102, fig. 

 Niagaran dolomite: Hamilton, Ontario. 



Dendrograptus ramosus Spencer. 



Dendrograptus ramosus Spencer, Canadian Nat., 10, 1882, p. 165 (nom. nud.); 



Trans. Acad. Sci. St. Louis, 4, 1884, p. 567, pi. 1, fig. 3; Bull. Mus. Uni 



State Missouri, 1, 1884, pp. 14, 17, pi. 1, fig. 3, 3a.~ Gurley, Jour. Geol. 



1896, pp. 95, 308. Bassler, Bull. U. S. Nat. Mus., 65, 1909, p. 8, pi. 1, fig. 



text figs. 3, 9. 

 Niagaran dolomite: Hamilton, Ontario. 



u, 



