664 BULLETIN 53, UNITED STATES NATIONAL MUSEOM. 



12452. Trigonia evansana Meek. Holotype. 



Nanaimo (Cret.). Nanaimo, Vancouver Island. 

 Meek, Trans. Albany Inst., IV, 1857, p. 42. 

 See Trigonia evansi. 



7529. Trigonia evansi Meek. - Cotypes. 



12452. Nanaimo (Cret.). Nanaimo, Vancouver Island. 



Meek, Bull. U. S. Geol. and Geogr. Surv. Terr., II, 1876, p. 359, 



pi. 2, figs. 7, 7a. 



— Trigonia evansana. 



3581. Trigonia lorentii Dana. Holotype. 



Jurassic. San Lorenzo, Peru, South America. 



Dana, Wilkes U. S. Expl. Exped., X, 1849, p. 721, pi. 15, figs. 

 2a, 2C. 



7817. Trigonia montanaensis Meek. Holotype. 



Jurassic. Near Lower Canj^on of the Yellowstone River, 

 Montana. 

 White, Twelfth Ann. Rept. U. S. Geol. Surv. Terr., Pt. I, 1S83, 

 P- 147, pl- 3 s , fi g- ?. 



12537. Trigonia quadrangularis Hall and Whitfield. Holotype. 



Jurassic. Near Como, Laramie Plains, Wyoming. 



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

 1S77, p. 293, pl. 7, fig. 22. 



9843. Trigonia texana Conrad. Holotype. 



Fredericksburg (Lower Cret.). Leon Springs, Texas. 



Conrad, Rept. U. S. Mexican Bound. Surv., Emory, I, Pt. II, 1857, 

 p. 14S, pl. 3, figs. 33-0. 



= Cyprina? texana. 



43596. Trigonodictya conciliatrix Ulrich. Cotypes and figured 



sections. 

 Black River (Ord.). Caunon Falls, Minnesota. 



Ulrich, Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. I, 

 1893, p. 160, pl. 9, figs. 11, 12; pl. 10, figs. 15-20. 



43595. Trigonodictya eatonensis Ulrich. Cotypes. 



Clinton (Sil.). Near Eaton, Ohio. 



Ulrich, Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. I, 

 1893, p. 160. 



1 12090. Trigonostoma subthomasiae Dall. Cotypes. 



Oligocene. Ballast Point, Tampa, Florida. 



Dall, Trans. Wagner Free Inst. Sci. Phila. , III, Pt. I, 1890, p. 44, 

 pl. 11, fig. 3. 



97356. Trigonostoma tenera Philippi. Plesiotypes. 



Pliocene. Caloosahatchie River, near Fort Thompson, 

 Florida. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. I, 1890, p. 43, 

 pl. 10, fig. 8. 



