TYPE SPECIMENS OF INVERTEBRATE FOSSILS. 443 



35262. Obolella lindstromi Walcott. Cotypes. 



35263. Lower Cambrian. Bjorkelunda, south of Simrishainr, 



and vSularp, near Lund, Sweden. 

 Walcott, I'roc. U. vS. Nat. Mus., XXIIl, 1901, p. 674. 



35261. Obolella mobergi Walcott. Cotype.s. 



Lower Cambrian. Bjorkelunda, Sweden. 



Walcott, Proc. U. vS. Nat. Mus., XXIII, igor, p. 673. 



1025. Obolella nana Meek and Hayden. Cotj'pes. 



Upper Cambrian. Central portions of Black Hills, South 

 Dakota. 



Meek and Hayden, Proc. Acad. Nat. Sci. Phila. for 1861, p. 435; 

 American Jonr. Sci. (2), III, 1862, p. 73, fij^-s. r, 2; Pal. Upper 

 Missouri, Smith. Contrib. to Knowl., Vol. XIV, 1864, p. 4, 

 pi. r, figs. 3-3d. 



= Dicellonuis nanus. 



24594. Obolella nana Meek and Hayden. Plesiotypes. 



Upper Cambrian. Headwaters of Red Canyon Creek, 

 Black Hills, South Dakota. 



Whitfield, Rept. Geol. and Resources Black Hills Dakota, 1880, 

 p. 340, pi. 2, figs. 14-16. 



= Dicellonuis nantis. 



15353. Obolella nitida Ford. Plesiotype. 



Lower Cambrian. Troy, New York. 



Walcott, Bull. No. 30, U. S. Geol. Surv., 1886, p. 118, pi. 11, fig. 

 2; Tenth Ann. Rept. U. S. Geol. Surv., 1890, p. 612, pi. 72, 

 fig. I. 



24593. Obolella polita (Hall). Plesiotypes. 



Upper Cambrian. Head of Redwater Canyon, Black Hills, 

 South Dakota. 



Whitfield, Rept. Geol. and Resources Black Hills Dakota, 1880, 

 P- 339. Pl- 2, figs. 12, 13. 



= Lingulepis prima. 



35206. Obolus ( Lingulepis ) acuminatus meeki Walcott. 



Cotypes. 

 Flathead (Middle Cambrian). Crowfoot section, Gallatin 

 Range, Yellowstone National Park. 



Walcott, Mon. U. S. Geol. vSurv., XXXII, Pt. II, 1S99, p. 444, 

 pl. 60, figs. I, I a. 



35240. Obolus ( Lingulella ) acutangulus Roemer. Plesiotypes. 



Upper Cambrian. Llano Comity, Texas. 



Walcott, Proc. XT. S. Nat. Mus., XXI, 1898, pp. 392-4, 420, pl. 27, 

 fig. 6; pl. 28, figs. I, 2. 



35241. Obolus (Lingulella) amplus Owen. Plesiotypes. 



Middle Cambrian. Dakota, Minnesota. 



Walcott, Proc. U. S. Nat. Mus., XXI, 189S, pp. 392, 394, 420, 

 pl. 28, figs. 3, 4. 



