546 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



298. Protocardia (Leptocardia) subquadrata (Evans and Shu- 

 mard). Plesiotypes. 



Fox Hills (Cret.). Moreau River, South Dakota. 



Meek, Rept. U. S. Geol. Surv. Terr., IX, T876, p. 175, pi. 29, figs. 

 8a-e. 



15400. Protocaris marshi Walcott. Holotype. 



L/Ower Cambrian. Parker's Farm, Georgia, Vermont. 



Walcott, Bull. No. 30, U. S. Geol. Surv., 1886, p. 148, pi. 15, fig. 

 1; Tenth Ann. Rept. U. S. Geol. Surv., 1890, p. 629, pi. 81, 

 fig. 6. 



43287. Protocrisina exigua Ulrich. Figured sections of cotype. 



43288. Trenton (Ord.). Montreal, Canada; Trenton Falls, New 



York. 



Ulrich, Geol. Surv. 111., VIII, 1890, p. 405, pi. 29, fig. 4c; pi. 53, 

 figs. 11-iie. 



46537. Protoscolex covingtonensis Ulrich. Holotype. 



Utica (Ord.). Covington, Kentucky. 



Ulrich, Journ. Cincinnati Soc. Nat. Hist., I, 1879, P- 89, pi. 4, fig. 2. 



46538. Protoscolex ornatus Ulrich. Cotypes. 



Utica (Ord.). Covington, Kentucky. 



Ulrich, Journ. Cincinnati Soc. Nat. Hist., I, 1S79, p. 90, pi. 4, figs. 

 1, ia. 



46539. Protoscolex simplex Ulrich. Holotype. 



Utica (Ord.). Covington, Kentuckj^. 



Ulrich, Journ. Cincinnati Soc. Nat. Hist., I, 1S79, p. 91, pi. 4, fig. 4. 



46540. Protoscolex tenuis Ulrich. Holotype. 



Utica (Ord.). Covington, Kentuckj^. 



Ulrich, Journ. Cincinnati Soc. Nat. Hist., I, 1879, P- 9°> pi- 4> fig- 3- 



15309. Protospongia fenestrata Salter. Plesiotype. 



Middle Cambrian. Prospect Peak, Eureka District, Nevada. 



Walcott, Men. VIII, U. S. Geol. Surv., 1884, p. n, pi. 9, figs. 5, 

 5a, 5b; Bull. No. 30, U. S. Geol. Surv., 1886, p. 90, pi. 6, 



figs. 2-2b. 



45963 Protowarthia cancellata (Hall). Plesiotypes. 



to Black River (Ord.). Chatfield, West St. Paul, and eight 



45967. miles south of Cannon Falls, Minnesota. 



Trenton (Ord.). Covington, Kentucky, and Cannon 

 Falls, Minnesota. 



Ulrich and Scofield, Geol. and Nat. Hist. Surv. Minn., Final 

 Rept., Ill, Pt. II, 1897, p. 872, pi. 63, figs. 1-14. 



45958. Protowarthia concinna Ulrich and Scofield. Holotype. 



Richmond (Ord.). Spring Valley, Minnesota. 



Ulrich and Scofield, Geol. and Nat. Hist. Surv. Minn., Final 

 Rept., Ill, Pt. II, 1S97, p. 874, pi. 63, figs. 36-39. 



