512 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Euomphalopterus alatus americanus Kindle and Breger. 



Euomphalopterus alatus var. amerieanus Kindle and Breger, 28th Ann. Rep. 



Dept. Geol. Nat. Res. Indiana, 1904, p. 459, pi. 13, fig. 6. 

 Euomphalopterus alatus var. Kindle and Breger, ibid., 1904, p. 461. 

 Niagaran: Little Deer Creek, Carroll County, Indiana. 



Euomphalopterus alatus llmatoideus Kindle and Breger. 



Euomphalopterus alatus var. limatoidea Kindle and Breger, 28th Ann. Rep. 



Dep. Geol. Nat. Res. Indiana, 1904, p. 461, pi. 14, fig. 4. 

 Niagaran: Delphi, Indiana. 



Euomphalopterus alatus obsoletus Ulrich. 



Euomphalopterus alatus-obsoletus Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 934, 



figs. 5g-i. 

 Niagaran (Waldron): Waldron, Indiana. 



Euomphalopterus elora (Billings). 



Pleurotomaria Elora Billings, Geol. Canada, Geol. Surv. Canada, 1863, p. 343, 

 fig. 348; Pal. Foss., 1, Geol. Surv. Canada, 1865, p. 154, fig. 135 (adv. sheets 

 1861). Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 1889, p. 708, fig. 

 Whiteaves, Pal. Foss., Geol. Surv. Canada, 3, pt. 2, p. 74, pi. 11, figs. 5, 6. 



Euomphalopterus Elora Whiteaves, Geol. Surv. Canada, Pal. Foss., 3, pt. 4, 1906, 

 p. 331. Grabau and Shimer, N. A. Index Fossils, 1, 1909, p. 630, fig. 853. 



Niagaran (Guelph): Elora, Ontario. 



Euomphalopterus halel (Hall). 



Pleurotomaria halei Hall, Rep. Sup. Geol. Surv. Wisconsin, 1861, p. 34. Win- 



chell and Marcy, Mem. Boston Soc. Nat. Hist., 1, 1865, p. 109. Hall,. 20th 



Rep. New York State Cab. Nat. Hist., 1868, pp. 344, 364, pi. 15 (6), figs. 



13, 14 (extras, 1865); rev. ed., 1870, p. 392, pi. 15, figs. 13, 14, p. 432. White- 



' aves, Pal. Foss., Geol. Surv. Canada, 3, pt. 2, 1895, p. 73, pi. 10, figs. 2, 2a. 



Eotomaria halei Clarke and Ruedemann, Mem. New York State Mus., 5, 1903, p. 



69 (gen. ref.). 



Trochonema halei Miller, N. A. Geol. Pal., 1889, p. 428 (gen. ref.). 

 Euomphalopterus Halei Whiteaves, Geol. Surv. Canada, Pal. Foss., 3, pt. 4, 



1906, p. 330 (gen. ref.). 

 Niagaran: Racine, Wisconsin; Bridgeport, Illinois (Racine); Durham, Ontario; 



and Wisconsin (Guelph). 



Euomphalopterus tyrrelli Parks. 



Euomphalopterus tyrrelli Parks in Tyrrell, 22d Rep. Ontario Bur. Mines, 1913, 

 p. 36. 



Niagaran (Guelph) : Severn River, Ontario. 



Euomphalopterus Valeria (Billings). 



Pleurotomaria Valeria Billings, Pal. Foss., 1, Geol. Surv. Canada, 1865, p. 169. 

 Whiteaves, Pal. Foss., Geol. Surv. Canada, 3, pt. 1, 1884, p. 23, pi. 4, figs. 

 1, la; ibid., pt. 2, 1895, p. 71, pi. 11, figs. 2, 3. Lesley, Geol. Surv. Penn- 

 sylvania, Rep. P 4, 1889, p. 721, figs. 



Euomphalopterus Valeria Whiteaves, Pal. Foss., Geol. Surv. Canada, 3, pt. 4, 

 1906, p. 330 (gen. ref.). Grabau, Michigan Geol. Surv., Geol. Ser., 1, 1909, 

 p. 191, pi. 28. Grabau and Shimer, N. A. Index Fossils, 1, 1909, p. 630, 

 figs. 851h, j, 852. 



Niagaran (Guelph): Gault, etc., Ontario; Ohio. 



Upper Monroan (Lucas): Salt shaft, Detroit, Michigan. 



