82 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



461. Avicula subgibbosa Meek and Hayden. Holotype. 



Fox Hills (Cret.)- Long Lake, North Dakota. 



Meek and Hayden, Proc. Acad. Nat. Sci. Phila., for i860, p. 180. 

 = Avicula linguif ormis subgibbosa. 



205. Avicula (Monotis) tenuicostata Meek and Hayden. 



Cotypes. 

 Jurassic. Black Hills, South Dakota. 



Meek and Hayden, Proc. Acad. Nat. Sci. Phila., for 185S, p. 50. 



= Eumicrotis curta. 



3660. Avicula volgensis Verneuil? Plesiotype. 



Carboniferous. Wollongong Point, Illawarra, New South 

 Wales, Australia. 



Dana, Wilkes U. S. Expl. Exped., X, 1849, p. 704, Atlas pi. 9, 

 fig- 4- 



23029. Avicula fOxytoma) whiteavesi Stanton. Holotype. 



Knoxville (Lower Cret.). Five miles north of Paskenta, 

 California. 



Stanton, Bull. No. 133, U. S. Geol. Surv., 1895 (Feb., 1896), p. 38, 

 pi. 4, fig. 1. 



14353. Aviculopecten affinis Walcott. Cotype. 



Lower Carboniferous. Eureka District, Nevada. 



Walcott, Mon. VIII, U. S. Geol. Surv., 1884, p. 229, pi. 19, 

 figs. 1, ia. 



8189. Aviculopecten? altus White. Holotype. 



Triassic. Twenty miles west of John Gray's Lake, South- 

 eastern Idaho. 



White, Twelfth Ann. Rept. U. S. Geol. Surv. Terrs., Pt. I, 1878 

 (1883), p. 1 10, pi. 32, fig. 3a. 



12547. Aviculopecten (Eumicrotis?) augustensis Hall and Whit- 

 field. Holotype. 

 Jurassic. Shoshone Springs, Augusta Mountains, Nevada. 



Hall and Whitfield, Rept. U. S. Geol. Expl. 40th Par., IV, Pt. II, 

 1877, p. 288, pi. 7, fig. 15. 



14179. Aviculopecten catactus Meek. Cotypes. 



Lower Carboniferous. White Pine Mountains, near 

 Hamilton, Nevada. 



Meek, Rept. U. S. Geol. Expl. 40th Par., IV, Pt. I, 1877, p. 93, 

 pi. 3, figs. 10, 10a, (?iob). 



6508. Aviculopecten carboniferous (Stevens). Plesiotypes. 



L T pper Carboniferous. Nebraska City, Nebraska. 



Meek, Final Rept. U. S. Geol. Surv. Neb. 1872, p. 193, pi. 4, fig. 

 S; pi. 9, figs. 4a. 4b. — White, Thirteenth Ann. Rept. Geol. 

 Surv. Indiana, 1S84, p. 144, pi. 28, figs. 5, 6. 



