TYPE SPECIMENS OF IXVEKTEHRATE FOSSILS. 385 



13310. Mactra ? gaviotensis Conrad. Holotype. 



Miocene. Gaviote Pas.s, California. 



Conrad, Rept. Expl. and Snrv. R. R. Miss. Riv. to Pacific Oct^an, 

 VII, 1S57, p. 194, pi. 7, fig. 4. 



297. Mactra gracilis Meek and Harden. Holotype and paratypes. 

 Montana (Cret.). Yellow.stone River, Montana. 



Meek and na\(k'n, Proc. Acad. Nat. Sci. I'liila., for iS6c), ]>. 179. 



297. Mactra ( Cymbophora ?) gracilis (Meek and Hayden). 



Holotype and paratypes. 

 Montana (Cret.). Yellowstone River, near Miles City, 

 Montana. 



Meek, Rept. U. vS. Geol. vSurv. Terr., IX, 1.S76, p. 209, pi. 17, figs. 

 1 8a, 18b. 



7S40. Mactra ? holmesi (Meek). Holotype, paratypes, and 



S06S. plesiotypes. 



Fox Hills (Cret.). About four miles north of Golden 

 City, and near Canyon City, Colorado. 



White, Eleventh Ann. Rept. U. S. Geol. Surv. Terr., 1S79, P- 295, 

 pi. 6, figs. 5a, 5b, 4a, 4b. 



See Cyrena holmesi. 



22904. Mactra huerfanensis vStanton. Cotypes. 



Colorado (Cret.). Huerfano Park, Colorado. 



Stanton, Bull. No. 106, U. S. Geol. Surv., 1893, p. 122, pi. 27, 

 figs. 14, 15. 



8636. Mactra ? incompta White. Holotype. 



Colorado (Cret.). Five miles above Pueblo, Colorado. 



White, Rept. U. vS. Geogr. Surv. W. luoth Merid., IV, Pt. I, 1876, 

 p. [85, pi. 17, figs. 6a, 1). 



1913. Mactra (Cymbophora ?) nitidula (Meek and Hayden). 



Holotype and parat^'pe. 

 Fox Hills (Cret.). Deer Creek, near North Platte, 

 Wyoming. 



Meek, Rept. U. S. Geol. Surv. Terr., IX, 1876, p. 211, pi. 30, figs. 

 6a-c. 



See Tellina nitidula. 



207. Mactra siouxensis Meek and Hayden. . Cotypes and 



plastotypes. 

 Dakota (Cret.). Big' vSioux River, two miles above its 

 mouth, South Dakota. 



Meek and Ilavden, Proc. .\cad. Nat. Sci. Phila., for 1S61, j). 179. 



= Mactra (Cymbophora?) siouxensis. 



23232— 05 -rr:.^ 25 



