398 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Dendrocrinus rusticus Billings. 



Dendrocrinus rusticus Billings, Geol. Surv. Canada, Rep. Prog, for 1853-56, 1857, 



p. 270; Geol. Surv. Canada, dec. 4, 1859, p. 41, pi. 3, figs. 7a, 7b. 

 Trenton: Ottawa, Ontario. 



DENDROCRINUS (HOMOCRINUS) SCOPARIUS Wachsmuth and Springer. See Lasiocri- 

 nus scoparius. 



Dendrocrinus similis Billings. 



Dendrocrinus similis Billings, Geol. Surv. Canada, Rep. Progr. for 1853-56, 1857 



p. 267; Geol. Surv. Canada, dec. 4, 1859, p. 40. 

 Trenton: Ottawa, Ontario. 



Dendrocrinus tener Billings. 



Dendrocrinus tener Billings, Cat. Sil. Foss. Anticosti, Geol. Surv. Canada, 1866, 



p. 9. 

 Richmond (Charleton): West End, Anticosti. 



Observation. Not recognized. Twenhofel reports the specimen as too poor for 

 determination . 



DENDROCYSTIS Haeckel. See Dendrocystites Barrande. 



DENDROCYSTITES Barrande. Genotype: D. sedgwicki Barrande 



?Syringocrinus Billings, Canadian Org. Rem., dec. 4, 1859, p. 65. Wachsmuth 



and Springer, Proc. Acad. Nat. Sci. Philadelphia; 1881, p. 411 (Rev. Pal., 



pt. 2, p. 237). Miller, N. A. Geol. Pal., 1889, p. 285. Bather, Treatise on 



Zool., pt. 3, Echinoderma, London, 1900, p. 203. Zittel, Grundzuge Pal., 1, 



1910, p. 156. 

 Dendrocystites Barrande, Extraits du Syst. Silur., 1887, p. 219; Syst. Silur. 



Boheme, 7, p. 142. Jaekel, Zeitschr. deutsch. geol. Gesell., 52, 1901, p. 673. 

 Dendrocystis Haeckel, Amphor.und Cystoid., 1, 1900, p. 47. Delage and Herou- 



ard, Zool. Concrete, 3, 1904, p. 408. Bather, Roy. Soc. Edinburgh, 49, pt. 2. 



1913, p. 371, text figs. 6-9. 



Dendrocystites? paradoxica (Billings). 



Syringocrinus paradoxicus Billings, Geol. Surv. Canada, dec. 4, 1859, p. 65, pi. 



10, fig. 14. 



Syringocrinus paradoxus Bather, Treatise on Zool., Echinoderma, 1900, p. 48. 

 Dendrocystis(?) paradoxica Bather, Trans. Roy. Soc. Edinburgh, 49, pt. 2, 1913, 



p. 397, fig. 13. 

 Trenton: Beauport, near Quebec, Canada. 



Observation. See Bather (op. cit., 1913) for discussion of Syringocrinus and 

 S. paradoxica. 



DENDROGRAPTUS Hall. Genotype: D. hallianus Prout. 



Dendrograptus Hall, Geol. Surv. Canada for 1857, Rep. Progr., 1858, p. 143; Rep. 

 Geol. Surv. Wisconsin, 1, 1862, p. 21; Geol. Surv. Canada, dec. 2, p. 126, 127, 

 figs. a,b, c. Nicholson, Quart. Jour. Geol. Soc. London, 24, 1868, p. 142. 

 Carruthers, Geol. Mag., 5, 1868, p. 73, 130. Hall, 20th Rep. New York State 

 Cab. Hist, 1868, p. 218; rev. ed., p. 252. Nicholson, Mon. British Grapt., 

 1872, p. 127.Zittel, Handb. Pal., 1, 1879, p. 289. Spencer, Bull. Mus. 

 Univ. State Missouri, 1, 1884, p. 16; Trans. Acad. Sci. St. Louis, 4, 1884, p. 

 262, 566. Miller, N. A. Geol. Pal., 1889, p. 184. James, Jour. Cincinnati 

 Soc. Nat. Hist., 14, pt. 2, 1892, p. 151. Pocta, Syst. Sil. Centre Boheme, 8, 

 pt. 1, 1894, p. 165. Roemer and Freeh, Leth. geog., 1, Theil, Leth. Pal., 1, 

 3 Lief., 1897, p. 577. Elles and Wood, Mon. British Grapt., Pal. Soc., 1903, 

 p. xli. Ruedemann, Mem. New York State Mus., 7, pt. 1, 1904, pp. 578, 579. 

 Grabau and Shimer, N. A. Index Fossils, 1, 1906, p. 26. Ruedemann, Zittel- 

 Eastman Textb., Pal., 2d. ed., 1913, p. 128. 



