520 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



46279. Plethocardia umbonata Ulrich. Holotype. 



Black River (Ord.). Six miles south of Cannon Falls, 

 Minnesota. 



Ulrich, Nineteenth Ann. Rept. Geol. and Nat. Hist. Surv. Minn., 

 1892, p. 244, fig. 28; Geol. and Nat. Hist. Surv. Minn., Final 

 Rept., Ill, Pt. II, 1894, p. 576, pi. 40, figs. 22-24. 



28137. Plethospira cassina Whitfield. Plesiotype. 



Beekmantown (Ord.). Fort Cassin, Vermont. 



Ulrich, Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. II, 

 1897, p. 1009, fig. 7a. 



45956. Plethospira semele (Hall). Plesiotype. 



Utica (Ord.). Graf, Iowa. 



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

 Rept., Ill, Pt. II, 1897, p. 1010, pi. 70, fig. 8. 



45957. Plethospira striata Ulrich. Holotype. 



Richmond (Ord.). Hanover, Butler County, Ohio. 



Ulrich, Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. II, 

 1897, p. ion, pi. 70, fig. 7. 



163460. Pleurodesma floridana Dall. Holotype. 



Pliocene. Shell Creek, De Soto County, Florida. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. VI, 1903, pi. 57, 

 fig- 30- 



107689. Pleurodon woodii Dall. Holotype. 



Pliocene. Caloosahatchie River, near Fort Thompson, 

 Florida. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. IV, 1898, p. 600, 

 pi. 24, fig. 10. 



115718. Pleurodonte bowdeniana Simpson. Cotypes. 



115719. Miocene. Bowden, St. Thomas, Jamaica, West Indies. 



Dall, Proc. U. S. Nat. Mus., XVII, 1S94, p. 450, pi. 16, figs. 3-5. 



12336. Pleuromya newtoni Whitfield. Cotypes. 



Jurassic. Two miles south of Belle Fourche River, near 

 Bear Lodge Butte, Black Hills, South Dakota: 



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

 P- 367. pl- 5. figs- 19. 20. 



2895S Pleuromya subcompressa (Meek). Plesiotj'pes. 



to Jurassic. Yellowstone National Park. 



2S961. Stanton, Mon. XXXII, Pt. II, U. S. Geol. Surv., 1899, p. 626, pl. 



74, figs. 8-11. 



27140. Pleurophorella papillosa Girty. Holotype and paratype. 



Cisco (Upper Carb.). Graham, Young County, Texas. 



Girty, Proc. U. S. Nat. Mus., XXVII, 1904, p. 729, pl. 45, figs. 

 4-6; pl. 46, fig. 5. 



