92 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Atrypa mansonii (Salter). 



Rhynchonella mansonii Salter, Sutherland's Jour. Voyage Baffins Bay, etc., 2, 



1852, p. ccxxi, i>l. 5, lig. 5. — Etheridge, Quart. Jour. Geol. Soc. London, 34, 



1878, p. 596. 

 Atrypa masonii Scliuchert, Bull. U. S. Geol. Surv., 87, 1897, p. 153. 

 Niagaran: Near Wellington Channel, Bessels Bay, Arctic America. 



Atrypa margiualis (Dalman). 



Terebratula marginalia Dalman, Kongl. Svenska Vet.-Akad. Handl. for 1827, 

 1828, p. 59, pi. 6, fig. 6. 



Atrypa marginalia Roemer, Sil. Fauna west. Tennessee, 1860, p. 69, pi. 5, fig. 10. — 

 Billings, Cat. Sil. Foss. Anticosti, 1866, p. 46.— Hall and ^V^litfield, 24th 

 Rep. New York State Cab. Nat. Hist., 1872, p. 197.— Davidson, Geol. Mag., 

 dec. 2, 8, 1881, p. 10, fig. 9; Mon. Brit. Foss. Bracliiopoda, 5, Sil. Suppl., 

 Pal. Soc, 1882, p. 122.— Foerste, Proc. Boston Soc. Nat. Hist., 24, 1890, p. 

 314, pi. 6, figs. 8, 9; Geol. Ohio, 7, 1895, p. 591, pi. 25, figs. 6, 9; pi. 31, figs. 

 8, 9.— Hall and Clarke, Pal. New York, 8, pt. 2, 1895, pi. 55, figs. 24, 25.— 

 Grabau and Shuner, N. A. Index Fossils, 1, 1907, p. 309. 



Trematospira matthewsoni McChesney, Descriptions New Pal. Fos., 1860, p. 

 71; Trans. Chicago Acad. Sci., 1,1868, p. 32, pi. 7, fig. 3. 



Atrypa nodostriata Foerste (not Hall), Bull. Denison Univ., 1, 1885, p. 90, pi. 

 13, fig. 9. 



AtrjT)a marginalis var. multistriata Foerste, Proc. Boston Soc. Nat. Hist., 24, 

 1890, p. 316, pi. 6, fig. 8. 



Silurian: Europe; Anticosti, etc., C'anada; New York, Pennsylvania, Ohio, etc. 

 (Brassfield-Niagaran) . 



Atrypa marginalis var. multistriata Foerste. See Atrypa marginalis. 



Atrypa modesta Hall. See Zygospira modesta. 



Atrypa naviformis Hall. See Whitfield ella(?) naviformis. 



Atrypa neglecta Hall. See Camarotcecliia (Stegerhynchus) neglecta. 



Atrypa nitida Hall. See Whitfieldella nitida. 



Atrypa nitida var. oblata Hall. See Whitfieldella oblata. 



Atrypa nodostriata Foerste. See Atrj^a marginalis. 



Atrypa nodostriata Hall. 



Atryim imbricata Hall (not Sowerby), Geol. New York, Rep. 4th Dist., 1843, 

 Tab. Org. Rem., 13, fig. 1. 



Atrypa nodostriata Hall, Pal. New York, 2, 1852, p. 272, pi. 56, fig. 2.— Hall and 

 Whitfield, Pal. Ohio, 2, 1875, p. 133, pi. 7, figs. 12-14.— Safford, Geol. Ten- 

 nessee, 1869, p. 315, text fig. 5. — Grabau, Bull. Buffalo Soc. Nat. Sci., 7, 

 1901, p. 196, fig. 114; Bull. New York State Mus., 45, 1901, p. 196, fig. 113.— 

 Grabau and Shimer, N. A. Index Fossils, 1, 1907, p. 309, fig. 387. 



Niagaran: Lockport, etc., New York (Rochester); Ontario; Ohio; Kentucky; 

 Wisconsin; Tennessee. 



Atrypa nucleolata Hall. See Whitfieldella(?) nucleolata. 



Atrypa nucleus Hall. See Triplecia nucleus. 



Atrypa obtusiplicata Hall. See Camarotoechia ol)tuRi])licata. 



Atrypa orbicularis Owen. 



Atrypa orbicularis Owen, Geol. Expl. Iowa, Wisconsin, Illinois, 2d cd., 1844, p. 

 80, pi. 15, fig. 9. 



