BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 63 



Archlnacella instabilis Incurva Ulrich and Scofield. 



Archinacella instabilia var. incurva Ulrich and Scofield, Geol. Minnesota, 3, pt. 



2, 1897, p. 835, pi. 61, figs. 21-23. 

 Black River (Decorah): Goodhue County, Minnesota. 

 Holotype.G&i. No. 45689, U.S.N.M. 



Archinacella orbiculata (Hall). 



Carinaropsis orbiculatus Hall, Pal. New York, 1, 1847, p. 306, pi. 83, figs. 8a-c. 

 Helcion orbiculatus D'Orbigny, Prodr. Pal., 1, 1849, p. 9 (gen. ref.). Emmons, 



Amer. Geol., 1, pt. 2, 1855, p. 164. 

 Arcliinacella orbiculata Ruedemann, Bull. New York State Mus., 162, 1912, p. 



108, pi. 7, figs. 1-6. 

 Trenton (Snake Hill): Snake Hill, Waterford, etc., New York. 



Archinacella patelliformis (Hall). 



Carinaropsis patelliformis Hall, Pal. New York, 1, 1847, p. 183, pi. 40, figs. 2a, b. 



Miller, Cincinnati Quart. Jour. Sci., 1, 1874, p. 314; N. A. Geol. Pal., 1889, 



p. 400, fig. 659. Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 1889, p. 117, 



figs. 

 Helcion patelliformis Emmons, Amer. Geology, 1, pt. 2, 1855, p. 164, pi. 6, fig. 1. 



D'Orbigny, Prodr. Pal., 1, 1849, p. 9 (gen. ref.). 

 Arcliinacella patelliformis Ulrich and Scofield, Geol. Minnesota, 3, pt. 2, 1897, 



p. 832 (gen. ref.). Weller, Geol. Surv. New Jersey, Pal., 3, 1903, p. 174, pi. 



12, figs. 1, 2. Grabau and Shinier, N. A. Index Fossils, 1, 1909, p. 606. 

 Black River-Maysville: Middleville, etc., New York (Trenton); New Jersey; 



Ohio; Missouri, etc. 



Archinacella perovalis (Whitfield). 



Metoptoma perovalis Wliitfield, Ann. Rep. Geol. Surv. Wisconsin, 1878, p. 74; 



Geol. Wisconsin, 4, 1882, p. 211, pi. 5, figs. 13 and 14. 

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



830, pi. 82, figs. 3 and 4. 

 Metoptoma explanata Sardeson, Bull. Minnesota Acad. Nat. Sci., 3, 1892, p. 



337, pi. 6, figs. 7, 8. 

 Black River (Platteville) : Minneapolis, Minnesota; Beloit, Wisconsin. 



Archinacella phillipsi (Walcott). 



Metoptoma phillipsi Walcott, Mon. U. S. Geol. Surv., 8, 1884, p. 83, pi. 1, figs. 



4, 4a. 

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



829 (gen. ref.) 



Upper Pogonip: Pogonip Ridge, Eureka District, Nevada. 

 Cotypes.C&t. No. 17359, U.S.N.M. 



Archinacella pileolum (Whitfield). 



Triblidium pileolum Whitfield, Bull. Amer. Mus. Nat. Hist., 2, 1889, p. 46, pi. 7, 



figs. 15-17. 

 Tryblidium pileolum Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 1890, p. 1236, 



figs. 

 Archinacella pileolum Ulrich and Scofield, Geol. Minnesota, 3, pt. 2, 1897, p. 826 



(gen. ref.). 

 Canadian (Beekmantown): Beekmantown, New York. 



Archinacella powersi Ulrich and Scofield. 



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

 pi. 61, figs. 3-5, p. 820, fig. la. 



