38(') BULLETIN a.'J, UNITED STATES NATIONAL MUSEUM. 



207. Mactra ( Cymbophora ?) siouxensis (Meek and Hayden). 



Cotypes and plastotypes. 

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

 month, vSonth Dakota. 



Meek, Rept. U. vS. GeoL Surv. Terr., IX, 1876, p. 206, pi. i, fig.s. 

 7b, 7c. 



See Mactra sionxensis. 



9855. Mactra texana Conrad. Cotypes. 



Eocene? Prairie l^etween Tyaredo and Rio Grande City, 

 Texas. 



Conrad, Rept. U. S. Mexican Hound. vSurv., Kniorv. I, Pt. II, 1857, 

 p. 148, pL 4, fis^s. la, il). 



153742. Mactra (Mactrotoma) undula Dall. Holotype. 



Pliocene. Near Darlington Court Honse, Sonth Carolina. 



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

 893, ])1. 28, fig. 12. 



7854. Mactra ( Cymbophora? ) utahensis Meek. Cotypes. 



12530. Colorado (Cret. ). East Canj'on Creek, ^\^^hsatch Range, 



and near Coalville, Utah. 



Meek, Rept. U. S. Geol. Expl. 40th Par., IV, I'l. I, 1877. p. 155, 

 pi. 15, fig.s. 9-9b. — Stanton, Bull. No. 106, U. S. Geol. Surv., 

 1893, p. I2(j, pi. 27, figs. 16, 17. 



304. Mactra warrenana Meek and Hayden. Holotype 



and paratypes. 

 Fox Hills (Cret.)- Moreau River, South Dakota. 



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



304. Mactra ( Cymbophora ? ) warrenana (Meek and Hayden). 



Holotype and paratypes. 

 Fox Hills (Cret.). Yankton, vSouth Dakota. 



Meek, Rept. IT. S. Geol. Surv. Terr., IX, 1876, p. 2u8, pi. 30, 

 figs. 7a-d. 



i5374<S- Mactra (Mactrotoma) willcoxii Dall. Holotype. 



Pliocene. Myakka River, Florida. 



Dall, Trans. Wagner Free In.st. Sci. Phila., HI. Pt. IV, 1898, p. 894, 

 ])1. 28, figs. 10, II. 



115653. Mactrinula macescens Onppy. Cotypes. 



Eocene. Manzanilla, Trinidad, British W'e.st Indies. 



(ruppy, Quart. Journ. Geol. vSoc. London, XXII, 1866, p. 581, 

 pi. 26, figs. 2a-2C. 



158265. Madracis ganei Vatighan. Cotypes. 



Claibornian (Iwcene). Natchitoches, Louisiana. 



Vaughan, Mon. XXXIX, U. vS. Geol, Surv., 1900, p. 128, pi. 13, 

 figs. 1-7. 



