384 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



192. Mactra alta Meek and Hayden. Holotype and paratype. 



Fox Hills (Cret.). Bad Lands of Judith River, Montana. 



Meek and Hayden, Proc. Acad. Nat. Sci. Phila.,VIII, 1856, p. 271. 



192. Mactra (Cymbophora) alta (Meek and Hayden). 

 2007. Holotype and paratype. 



Fox Hills (Cret.). Mouth of Judith River, Montana. 



Meek, Rept. U. S. Geol. Surv. Terr., IX, 1876, p. 210, pi. 37, figs. 

 2a, 2b. 



7853. Mactra (Trigonella) arenaria Meek. Cotypes. 



Montana (Cret.). Red Creek, Uinta Mountains, Utah. 



Meek, Rept. U. S. Geol. Expl. 40th Par., IV, Pt. I, 1877, p. 154, 

 pi. 14, fig. 5. 



7844. Mactra ? canonensis Meek. Holotype. 



Fort Pierre (Cret.). Canyon City, Colorado. 



Meek, Fourth Ann. Rept. U. S. Geol. Surv. Terr., 1871, p. 308.— 

 White, Eleventh Ann. Rept. U. S. Geol. Surv. Terr., 1879, 

 p. 297, pi. 9, figs. na-c. 



1 14650. Mactra chipolana Dall. Holotype. 



Oligocene. Calhoun County, Florida. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. IV, 1898, p. 892, 

 pi. 27, fig. 19. 



107615. Mactra (Mactrotoma) cymata Dall. Holotype. 



Oligocene. Oak Grove, Santa Rosa County, Florida. 



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

 p. 893, pi. 33, fig. 23. 



112271. Mactra ( Mactrella ?) darienensis Dall. Holotype. 



Eocene. Vamos-Vamos Station, Panama Canal, Darien. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. IV, 1898, p. 895. 



12525. Mactra ? emmonsi Meek. Cotypes. 



Colorado (Cret.). East Canyon Creek, Wasatch Range, 

 Utah. 



Meek, Rept. U. S. Geol. Expl. 40th Par., IV, Pt. I, 1877, p. 153, 

 pi. 15, fig. 8. 



22902. Mactra emmonsi Meek. Plesiotypes. 



22903. Colorado (Cret.). Huerfano Park, Colorado, and Coalville, 



Utah. 



Stanton, Bull. No. 106, U. S. Geol. Surv., 1893, p. 121, pi. 27, 

 figs. 9-13. 



177. Mactra (Cymbophora ?) formosa (Meek and Ha3'den). 



Cotypes. 

 Fox Hills (Cret.). Mouth of Judith River, Montana. 

 Meek, Rept. U. S. Geol. Surv. Terr., IX, 1876, p. 207, pi. 39. fig. 7. 



177. Mactra formosa Meek and Hayden. Cotypes. 



Fox Hills (Cret. ). Near mouth of Judith River, Montana. 



Meek and Hayden, Proc. Acad. Nat. Sci. Phila., VIII, 1856, p. 271. 



