BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 923 



Orthonota angulifera McCoy. 



Orthonota angulifera McCoy, British Pal. Rocks, 1850, p. 276. Billings, Pal. 



Foss., Geol. Surv. Canada, 2, pt. 1, 1874, p. 132, pi. 8, fig. 13, 13a. 

 Silurian: England; Arisaig, Nova Scotia. 



ORTHONOTA CONTRACTA Hall. See Orthodesma contractum. 



ORTHONOTA CURTA Hall. See Orthodesma curtum and Cuneamya alveata. 



Orthonota tncerta Billings. 



Orthonota incerta Billings, Pal. Foss., Geol. Surv. Canada, 2, pt. 1, 1374, p. 120, 



pi. 8, fig. 2. 

 Silurian: Arisaig, Nova Scotia. 



ORTHONOTA PARALLELA Hall. See Cymatonota parallela. 

 ORTHONOTA PHOLADIS Hall. See Cymatonota pholadis. 



Orthonota simulans Billings. 



Orthonota simulans Billings, Pal. Foss., Geol. Surv. Canada, 2, pt. 1, 1874, p. 131, 



pi. 8, fig. 4. 

 Silurian: Arisaig, Nova Scotia. 



Orthonota speciosa Billings. 



Orthonota? speciosa Billings, Pal. Foss., Geol. Surv. Canada, 2, pt. 1, 1874, p. 130, 



pi. 8, fig. 3. 

 Silurian: Arisaig, Nova Scotia. 



ORTHONOTA TRIANGULATA Salter. See Grammysia triangulata. 



Orthonota venusta Billings. 



Orthonota venusta Billings, Pal. Fosa., Geol. Surv. Canada, 2, pt. 1, 1874, p. 129, 



pl. 8, fig. 1. 

 Silurian: Arisaig, Nova Scotia. 



ORTHONOTELLA Miller. Genotype: 0. faberi Miller. 



Orthonotella Miller, Jour. Cincinnati Soc. Nat. Hist., 5, 1882, p. 117; N. A. Geol. 

 Pal., 1889, p. 498. 



Orthonotella faberi Miller. 



Orthonotella faberi Miller, Jour. Cincinnati Soc. Nat. Hist., 5, 1882, p. 117, pl. 5, 



figs. 7, 7a, 7b; N. A. Geol. Pal., 1889, p. 498, fig. 876. 

 Maysville (Fairmount) : Cincinnati, Ohio. 

 Observation. Probably not a pelecypod, possibly a crustacean. 



ORTHONYCHIA Hall. Genotype: Platyceras subrectum Hall. 



Orthonychia Hall, Nat. Hist. New York, 4, 1843, p. 172, fig. 3; p. 173; tab. ill. 



36, fig. 3. Owen, Amer. Jour. Sci. Arts, 2d ser., 1, 1846, p. 67, fig. 3. Hall, 



12th Rep. New York State Cab. Nat. Hist., p. 18; Pal. New York, 3, 1859, 



p. 330; 15th Rep. New York State Cab. Nat. Hist., 1861, p. 30. Meek and 



Worthen, Proc. Acad. Nat. Sci. Philadelphia, 1866, p. 263; Geol. Surv. 



Illinois, 3, 1868, pp. 385, 387. Hall, Pal. New York, 5, pt. 2, p. 2. Zittel, 



Handb. Pal., 2, 1882, p. 217. Koken, Neues Jahrb. f. Min., Geol. and Pal., 



6, Beiiage-Band, 1889, p. 466. Whidborne, Mon. Dev. Fauna South England, 



, Pal. Soc., 1891, p. 222. Keyes, Amer. Geol., 10, 1892, p. 275; Missouri 



Geol. Surv., 5, 1894, p. 187. Koken, Die Leitfossilien, Leipzig, 1896, p. 133. 



Pilsbry, Zittel-Eastman Textb. Pal., 1, 1900, p. 460, Dall, ibid., 2d ed., 



. 1913, p. 54. 



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