62 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Archinacella deformata (Hall). 



Orbicula? deformata HaU, Pal. New York, 1, 1847, p. 23, pi. 4, figs. lOa, lOb. 



(Orbicula deformis in explanation of plate.) 

 Crania? deformata Miller, N. A. Geol. Pal., 1889, p. 341. Hall and Clarke, Pal. 



New York, 8, pt. 1, 1892, p. 150. Schuchert, Bull. U. S. Geol. Surv., 87, 



1897, p. 189. 

 Archinacella? deformata Raymond, Amer. Jour. Sci., 4th eer., 20, 1905, p. 375; 



Ann. Carnegie Mus., 4, 1908, p. 171, pi. 46, figs. 1-6. Grabau and Shimer, 



N. A. Index Fossils, 1, 1909, p. 605, fig. 806. 

 Metoptoma deformis Billings, Geology Canada, 1863, p. 937. 

 Discina deformis Lincklaen, 14th Rep. New York State Cab. Nat. Hist., 1861, 



pi. 1, fig. 10. 

 Stenotheca dubia Whitfield and Hovey, Bull. Amer. Mus. Nat. Hist., 11, 1898, 



p. 58. 



Metoptoma dubia Hall, Pal. New York, 1, 1847, p. 23, pi. 4, figs, lla, lib. 

 Chazyan (Day Point-Valcour) : Crown Point, Valcour Island and Chazy, New 



York; Aylmer, Canada. 



Archinacella dele t a (Sardeson). 



Carinaropsis deleta Sardeson, Bull. Minnesota Acad. Nat. Sci., 3, 1892, p. 335, 



pi. 6, figs. 5, 6. 

 Archinacella deleta Ulrich and Scofield, Geol. Minnesota, 3, pt. 2, 1897, p. 831, 



pi. 61, figs. 16-20. Grabau and Shimer, N. A. Index Fossils, 1, 1909, p. 606, 



fig. 805c-e. 



Black River (Decorah): Minneapolis, St. Paul, Cannon Falls, etc., Minnesota. 

 Plesiotype.C&t. No. 45687, U.S.N.M. 



Archinacella depressa Ulrich and Scofield. 



Archinacella depressa Ulrich and Scofield, Geol. Minnesota, 3, pt. 2, 1897, p. 



830, pi. 61, figs. 8 and 9. 



Black River (Platteville) : Minneapolis, Minnesota. 

 Plastotype.Ca,t. No. 45688, U.S.N.M. 



Archinacella estella (Billings). 



Metoptoma estella Billings, Pal. Fossils, 1, Geol. Surv. Canada, 1865, p. 153, fig. 



134a, b (advance sheets, 1862); Cat. Sil. Fossils Anticosti, Geol. Surv. 



Canada, 1866, p. 18 (loc. ref.). 

 Tryblidium? estella, Whiteaves, Pal. Foss., Geol. Surv. Canada, 3, pt. 1, 1894,- 



p. 31 (gen. ref.). 

 Archinacella estella Ulrich and Scofield, Geol. Minnesota, 3, pt. 2, 1897, p. 829 



(gen. ref.). 

 Richmond (English Head) : English Head, Anticosti. 



Archinacella indianensis (Miller). 



Tryblidium indianense Miller, 17th Ann. Rep. Dep. Geol. Nat. Res. Indiana, 

 1892, p. 695, pi. 14, fig. 14 (adv. sheets, 1891, p. 85). Cumings, 32d Ann. 

 Rep. Dep. Geol. Nat. Res. Indiana, 1908, p. 977, pi. 39, fig. 11. 

 Richmond: Fayette County, Indiana. 

 Observation. Compare Archinacella richmondensis Ulrich. 



Archinacella instabilis (Billings). 



Metoptoma instabilis Billings, Pal. Foss., 1, Geol. Surv. Canada, 1865, p. 251, 



fig. 236a, b. 

 Tryblidium? instabilis Whiteaves, Pal. Fossils, Geol. Surv. Canada, 3, pt. 1, 



1884, p. 31 (gen. ref.). 

 Archinacella instabilis Ulrich and Scofield, Geol. Minnesota, 3, pt. 2, 1897, p. 



829 (gen. ref.). 

 Chazyan (Quebec L): Table Head, Newfoundland. 



