232 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



23870. Domatoceras umbilicatum Hyatt. Holotype. 



Upper Carboniferous. Oswego, Kansas. 



Hyatt, Second Ann. Rept. Geol. Surv. Texas, 1891, p. 343, text 

 figs. 45, 46. 



39940. Donacicrinites simplex Troost. Chirotype. 



Silurian. Decatur County, Tennessee. 



Troost, Proc. Amer. Assoc. Adv. Sci., II, 1850, p. 62. 



108450. Donax aequilibrata Dall. Holotype. 



Pliocene. Cape Fear River, North Carolina. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. V, 1900, p. 

 968, pi. 28, fig. 17. 



114682. Donax chipolana Dall. Holotype. 



Qligocene. Chipola River, Calhoun Count}', Florida. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. V, 1900, p. 966, 

 pi. .44. fig- 20. 



228S8. Donax cuneata Stanton. Holotype. 



Colorado (Cret.). Bear River City, Wyoming. 



Stanton, Bull. No. 106, U. S. Geol. Surv., 1893, p. no, pi. 25, 

 fig. 1. 



1 15034. Donax emmonsi Dall. Plesiotype. 



Miocene Magnolia, Duplin Count}*, North Carolina. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. V, 1900, p. 967, 

 pi. 28, fig. 16. 



1 15654. Donax flabagelloides Guppy. Holotype. 



Pliocene. Matura, Trinidad, British West Indies. 



Guppy, Geol. Mag.. London, Dec. II, I, 1874, p. 435, pi. 18, fig. 10. 



22889. Donax ? oblonga Stanton. Cotypes. 



Colorado (Cret. ). Coalville, Utah. 



Stanton, Bull. No. 106, U. S. Geol. Surv., 1893, p. in, pi. 25, 

 fig. 2. 



3613. Donax ? protexta Conrad. Holotype. 



Miocene. Astoria, Oregon. 



Conrad, Wilkes U. S. Fxpl. Exped., X, 1S49, pp. 723, 724, Atlas, 

 pi. 17, fig. 9. 



= Solen ( Plectosolen ) protextus. 



1 15722. Dosinia Dosinidia ) acetabulum obliqua Dall. Holotype. 

 Chesapeake ( Miocene). Alum Bluff, Florida. 



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

 1231, pi. 54, fig. 13. 



164869. Dosinia ? alaskana Dall. Holotype. 



Miocene. Popof Island, Shumagins, Alaska. 



Dall, Ilarriman Alaska Exped., IV, 1904, p. 115, pi. 10, fig. 7. 



