856 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



NIESZKOWSKIA— Continued. 



Minnesota, 3, pt. 2, 1894, pp. 737-738.— Reed, Geol. Mag., dec. 4, 3, 1896, pp. 

 118, 162.— Koken, Die Leitfossili?.n, Leipzig, 1896, p. 35, figs. 7, 7a— Reed ? 

 Geol. Mag., dec. 4, 5, 1898, p. 208.— Raymond, Annals Carnegie Mus., 3, 

 1905, p. 376; Zittel-Eastman Textb. Pal., 1913, p. 725. 



Nieszkowskia biliingsi (Raymond). 



Cheirurua vulcanua Billings, Pal. Foss. Canada, 1, 1865, p. 324, fig. 310a-c 



(not p. 271, figs. 271a-c). 

 Pseudosphaerexochus vulcanua billingsi Raymond, Ann. Carnegie Mus., 3, 1905, 



p. 369, pi. 14, fig. 17, text fig. 11; 7th Rep. Vermont State Geol., 1910, p. 242, 



pi. 36, fig. 17. 

 Chazyan (Valcour): Sloop Bay and Valcour Island, New York; Stanbridge, 



Quebec. 



Nieszkowskia glaucus (Billings). 



Cheirurus Glaucus Billings, Pal. Foss., 1, Geol. Surv. Canada, 1865, p. 323, figs. 



308a, b. 

 Ceraurus (Nieszkowskia) glaucus Clarke, Geol. Minnesota, 3, pt. 2, 1894, p. 738. 

 Chazyan(?): Stanbridge, Quebec. 



Nieszkowskia mars (Hudson). 



Cheirurus mars Hudson, Bull. New York State Mus., 80, 1905, p. 205, pi. 5, 



figs. 1, 2. 

 Nieszkowskia mars Raymond, 7th Rep. Vermont State Geol., 1910, p. 244. 

 Chazyan (Valcour): Valcour Island, New York. 



Nieszkowskia perforator (Billings). 



<heirurus perforator Billings, Pal. Foss., 1, Geol. Surv. Canada, 1865, p. 287, 



fig. 275. 

 Ceraurus (Nieszkowskia) perforator Clarke, Geol. Minnesota, 3, pt. 2, 1894, 



p. 738 (gen. ref.). 

 Chazyan (Quebec-N): Table Head, Newfoundland. 



Nieszkowskia satyrus (Billings). 



Cheirurus Satyrus Billings, Pal. Foss., 1, Geol. Surv. Canada, 1865, p. 324, fig. 309. 

 Ceraurus (Nieszkowskia) satyrus Clarke, Geol. Minnesota, 3, pt. 2, 1894, p. 738. 

 Pseudosphaerexochus (Nieszkowskia) satyrus Raymond, Ann. Carnegie Mus., 3, 



1905, p. 371, pi. 14, fig. 21. 

 Nieszkowskia satyrus Raymond, 7th Rep. Vermont State Geol., 1910, p. 224, 



pi. 36, fig. 21. 

 Chazyan (Valcour): Montreal, Quebec; Sloop Island, east of Valcour Island, 



New York. 



NILEUS Dalman. Genotype: Asaphus (Nileus) armadillo Dalman. 



Nileus Dalman, Svenska Vet.-Akad. Handl., 1826, 1827, pp.246, 276.— Dalman- 

 Engelhart, Die Palaeaden, Nurnberg, 1828, p. 49. — Green, Mon. Tril. N. A., 

 1838, p. 18.— Eichwald, Zool. Specialis, pt. 2, Vilnae, 1830, p. 116.— Goldfuss, 

 Neues Jahrb. Min., etc., 1843, pp. 540, 551. — Burmeister, Org. der Tril., 

 Berlin, 1843, p. 123.— Rouault, Bull. Soc. Geol. France, 2d ser., 4, 1847, p. 

 318— Hawle and Corda, Abh. d. k. bohmischen Gesell., d. Wiss., 5, 1847 

 (extract), p. 52, pi. 4, fig. 35.— Angelin, Pal. Scandinavica, 3d ed., Holmiae, 

 1878, p. 18.— Barrande, Neues Jahrb. Min., etc., 1850, p. 779.— Pictet, Traite 

 de Pal., 2d ed., 2, 1854, p. 516.— Salter, Mon. British Tril., Pal. Soc, 1866, 

 pp. 148, 171.— Zittel, Handb. Pal., 2, 1885, p. 610.— Brogger, Bihang till K. 

 Sven. Vet.-Akad. Handl., 11, No. 3, 1886, p. 64; Afh. Sveriges Geol. Unders., 

 Ser. C, No. 82, 1886, p. 64.— Miller, N. A. Geol. Pal., 1889, p. 557.— Koken, 



