TYPE SPECIMENS OF INVERTEBRATE FOSSILS. 517 



23845. Platyceras texanum Walcott. Cotypes. 



Upper Cambrian. Packsaddle Mountain, Burnett County, 

 Texas. 

 Walcott, Proc. U. S. Nat. Mus., XIII, 1890, p. 268.pl. 20, fig. 5. 



13924. Platyceras thetiforme Walcott. Cotypes. 



Middle Devonian. Brush Peak, Eureka District, Nevada. 



Walcott, Mon. VIII, U. S. Geol. Surv., 1884, p. 184, pi. 6, figs. 4-4I). 



46534. Platyceras tribulosum White. Holotype. 



Burlington (Miss.). Burlington, Iowa. 



White, Twelfth Ann. Rept. U. S. Geol. Surv. Terr., Pt. I, 18S3, 

 p. 168, pi. 41, figs. 6a, 6b. 



13923. Platyceras undulatum Walcott. Holotype. 



Middle Devonian. Brush Peak, Eureka District, Nevada. 



Walcott, Mon. VIII, U. S. Geol. Surv., 1884, p. 184, pi. 6, figs. 2, 2a. 



45955. Platyceras ? wisconsinense Ulrich and Scofield. Cotypes. 

 Stones River (Ord. ). Beloit, Wisconsin. 



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

 Rept., Ill, Pt. II, 1897,, p. 1068, pi. 61, figs. 49-52. 



158316. Platycoenia jacksonensis Vaughan. Holotype. 



Jacksonian (Eocene). Jackson, Mississippi. 



Vaughan, Mon. XXXIX, U. S. Geol. Surv., 1900, p. 150, pi. 17, 

 figs. 9-9C. 



Platycrinites. See Platycrinus. 



39888. Platycrinus ann-dixoni Troost. Chirotypes. 



Silurian. Decatur County, Tennessee. 



Troost, Proc. Amer. Assoc. Adv. Sci., II, 1850, p. 61. 



7806. Platycrinus haydeni Meek. Holotype. 



Dower Carboniferous. Old Baldy, near Virginia City, 

 Montana. 



Meek, Sixth Ann. Rept., U. S. Geol. Surv. Terr., 1873, p. 469, 

 and footnote, as Platycrinites haydeni. — White, Twelfth Ann. 

 Rept. U. S. Geol. Surv., Terr., Pt. I, 1S83, p. 122, pi. 33, 

 fig. 7a. 



24185. Platycrinus hemisphericus Meek and Worthen. Plesiotype. 

 Keokuk (Miss.). Crawfordsville, Indiana. 



Grabau, Amer. Journ. Sci. (4), XVI, 1903, p. 296, fig. 8, p. 297. 



39886. Platycrinus huntsvillae Troost. Chirotypes. 



Mississippi an. Near Huntsville, Tennessee. 

 Troost, Proc. Amer. Assoc. Adv. Sci., II, 1850, p. 61. 



7805. Platycrinus (Eucladocrinus) montanaensis Meek. 



Holotype. 

 Dower Carboniferous. Twin Springs, Dry Creek Valley, 

 Montana. 



Meek, Fifth Ann. Rept. U. S. Geol. Surv. Terr., 1S72, p. 373. 



= Eucladocrinus montanaensis. 



