BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 387 



Dawsonia acuminala Nicholson. 



Dawsonia actiminata Nicholson, Ann. Mag. Nat. Hist., 4th ser., 11, 1878, p. 140, 



fig. 3a, a'. Ruedemann, Mem. New York State Mus., 11, pt. 2, 1908, p. 485, 



fig. 466. 

 Lower Ordovician: Point Levis, Quebec (Levis); Scotland (Llandeilo). 



DAWSONIA CAMPANULATA Ruedemann. See Azygograptus? simplex. 



Dawsonia monodon Gurley. 



Dawsonia monodon Gurley, Jour. Geol., 4, 1896, p. 88, pi. 5, fig. 4. Ruedemann, 

 New York State Pal. Ann. Rep., 1902, pp. 554, 556; Mem. New York State 

 Mus., 7, pt. 1, Addendum, 1904, pp. 741, 742, pi. 17, figs. 21-26, fig. 105. 



Canadian: Point Levis, Quebec (Levis, Didymograptus zone); Deepkill, Rens- 

 selaer County, New York (Deepkill, Tetragraptus zone). 



DAWSONIA ROTUNDA Nicholson. See Acrothele rotunda. 

 DAWSONIA SILIQUARIA James. See Lockeia siliquaria. 



Dawsonia tenuistriata Nicholson. 



Dawsonia tenuistriata Nicholson, Ann. Mag. Nat. Hist., 4th ser., 11, 1873, p. 141, 



fig. 3c, c', d, d'. 

 Canadian (Levis): Point Levis, Quebec. 



Observation. The specimens figured by Nicholson are very probably small 

 brachiopods. 



awsonia trldens Gurley. 



Dawsonia tridens Gurley, Jour. Geol., 4; 1896, p. 88, pi. 5, fig. 5. Ruedemann, 



New York State Pal. Ann. Rep., 1902, p. 556; Mem. New York State Mus., 



7, pt. 1, Addendum, 1904, p. 741, pi. 17, figs. 18-20. 

 Canadian: Point Levis, Quebec (Levis, Tetragraptus zone); Deepkill, Rensselaer 



County, New York (Deepkill, Tetragraptus zone). 



AWSONOCERAS Hyatt. Genotype: Orthoceras annulatum Sowerby. 



Dawsonoceras Hyatt, Proc. Boston Soc. Nat. Hist., 22, 1884, p. 276; Zittel- 

 Eastman Textb. Pal., 1, 1900, p. 518; 2d ed., 1913, p. 599. Clarke and 

 Ruedemann, Mem. New York State Mus., 5, 1903, p. 82. Grabau and Shimer, 

 N. A. Index Fossils, 2, 1910, p. 58. 



awsonoceras annulatum (Sowerby). 



Orthoceras annulatum Sowerby, Min. Conch., 2, 1818, p. 77; Eaton, Geol. Textb., 

 2d ed., 1832, p. 29, pi. 3, fig. 24. Hall, Nat. Hist. New York, Geol., 4, 1843, 

 p. 110, fig. 1; tab. ill. 17, fig. 1; Pal. New York, 2, 1852, p. 96, pi. 29, fig. 3. 

 Marcou, Geol. Map United States and British Provinces, etc., 1853, p. 27, 

 pi. 2, fig. 1. Roemer, Sil. Fauna West Tennessee, Breslau, 1860, p. 78, pi. 

 5, figs. 18a, 18b. Billings, Cat. Sil. FOBS. Anticosti, Geol. Surv. Canada, 

 1866, p. 83. Hall, 20th Rep. New York State Cab. Nat. Hist., 1868 (Extras, 

 1865), p. 351, pi. 20 (11), figs. 4-6 (see expl. of pis., p. 393); rev. ed., 1870, 

 p. 411, pi. 20, figs. 4-6; pi. 24, figs. 2-4, p. 433. Hall and Whitfield, Geol. 

 Surv. Ohio, Pal., 2, 1895, p. 147, pi. 9, fig. 1. Whitfield, Geol. Wisconsin, 4, 

 1882, p. 298, pi. 19, fig. 1. Hall, llth Ann. Rep. Indiana Dep. Geol. Nat. 

 Hist., 1882, p. 324. White, ibid., 1882, p. 358, pi. 38, fig. 1. Chamberlin, 

 Geol. Wisconsin, 1, 1883, p. 194. Whiteaves, Pal. FOBS., Geol. Surv. Canada, 

 3, 1884, pt. 1, p. 38. Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 1889, p. 

 542, figs. Grabau, Bull. Buffalo Soc. Nat. Sci., 7, 1901, p. 215, fig. 147; 

 Bull. New York State Mus., 45, 1901, p. 215, fig. 147. 



