448 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



35208. Obolus (Lingulella) randomensis Walcott. Cotypes. 



Upper Cambrian. Random Island, Smith Sound, Trinity 

 Bay, Newfoundland. 

 Walcott, Proc. U. S. Nat. Mus., XXIII, 1901, p. 688. 



27300. Obolus rhea Walcott. Cotypes. 



Middle Cambrian. Eau Claire, Wisconsin. 



Walcott, Proc. U. S. Nat. Mus., XXI, 1898, p. 387. 



27336. Obolus (Lingulella) rogersi Walcott. Cotypes. 



Lower Ordovician. Narragansett Bay, Rhode Island. 

 Walcott, Proc. U. S. Nat. Mus., XXI, 1898, p. 413. 



27337. Obolus (Lingulella) rotundatus Walcott. Cotypes. 



27338. Upper Cambrian and Lowest Ordovician. Schellbourne, 



Schell Creek Range, Nevada; west of Bear Creek, and 

 south of Gallatin Valley, Montana. 



Walcott, Proc. U. S. Nat. Mus., XXI, 1898, p. 415. 



35229. Obolus (Acritis?) rugatus Walcott. Holotype. 



Upper portion of Middle Cambrian. Secret Canyon, Eureka 

 District, Nevada. 

 Walcott, Proc. U. S. Nat. Mus., XXIII, 1901, p. 694. 



35291. Obolus (Lingulella) schmalensei Walcott. Cotypes. 



Middle Cambrian. Skane, Andrarum, Sweden. 



Walcott, Proc. U. S. Nat. Mus., XXV, 1902, p. 605. 



35258. Obolus (Lingulella) siemiradzkii Walcott. Cotypes. 



Middle Cambrian. Pepper Mountains, near Sandomir on 

 the Vistula, Russian Poland. 

 Walcott, Proc. U. S. Nat. Mus., XXIII, 1901, p. 690. 



27339. Obolus ( Lingulella ) similis Walcott. Cotypes. 



27340. Middle Cambrian. Deadwood, Black Hills, South Dakota. 



Walcott, Proc. U. S. Nat. Mus., XXI, 1898, p. 415. 



27341. Obolus (Lingulella) sinoe Walcott. Cotypes. 



Middle Cambrian. Packsaddle Mountain, Llano County, 

 Texas. 

 Walcott. Proc. U. S. Nat. Mus., XXI, 1898, p. 416. 



35290. Obolus (Lingulella) spatulus Walcott. Cotypes. 



Tonto ( Middle Cambrian ) . Grand Canyon of the Colorado, 

 southeast of Powells Plateau, Arizona. 

 Walcott, Proc. U. S. Nat. Mus., XXV, 1902, p. 607. 



27342. Obolus ( Lingulella ) tarpa Walcott. Cotypes. 



Middle Cambrian. One mile east of Postoak Springs, 

 Roane County, Tennessee. 

 Walcott, Proc. U. S. Nat. Mus., XXI, 1898, p. 417. 



