664 BULLETIN 53, UNITED STATES NATIONAL MUSEtfM. 



12452. Trigonia evansana Meek. Holotype. 



Nanaimo (Cret.). Nanaimo, Vancouver Island. 

 Meek, Trans. An)aiiy Inst., IV, 1857, p. 42. 

 See Trigonia evansi. 



7529. Trigonia evansi Meek. Cotypes. 



12452. Nanaimo (Cret.). Nanaimo, Vancouver I.sland. 



Meek, Bnll. U. S. Cieol. and Geojjr. Surv. Terr., II, 1S76, p. 359, 

 pi. 2, figs. 7, 7a. 



= Trigonia evansana. 



3581. Trigonia lorentii Dana. Holotype. 



Jurassic. vSan Lorenzo, Peru, South America. 



Dana, Wilkes U. S. Expl. Exped., X, 1S49, j). 721, pi. 15, fiirs. 

 2a, 2C. 



7817. Trigonia montanaensis Meek. Holotype. 



Jurassic. Near Lower Canyon of the Yellowstone River, 

 Montana. 



White, Twelfth Ann. Rept. U. S. Geol. vSurv. Terr., Pt. I. 1883, 

 p. 147, pi. 38, fig. 2. 



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, 

 1877, p. 293, pi. 7, fig. 22. 



9843. Trigonia texana Conrad. Holotj-pe. 



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



Conrad, Rept. U. vS. Mexican Bound. Surv., P^niory, I, Pt. II, 1857, 

 p. 148, pi. 3, figs. 3a-c. 



= Cyprina? texana. 



43596. Trigonodictya conciliatrix lUrich. Cotypes and figured 



sections. 

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



Ulrich, Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. 1, 

 1893, p. i6u, pi. 9, figs. II, 12; pi. 10, figs. 15-20. 



43595. Trigonodictya eatonensis Ulrich. Cotypes. 



Clinton (vSil.). Near Eaton, Ohio. 



Ulrich, Geol. and Nat. Hist. Surv. Minn., h'inal Rept., Ill, I't. I, 

 1893, "p. 160. 



1 1 2090. Trigonostoma subthomasiae Ball. Cotypes. 



Oligocene. Ballast Point, Tampa, Florida. 



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

 pi. II, fig. 3. 



97356. Trigonostoma tenera Philippi. Plesiotypes. 



Pliocene. Caloo.sahatchie River, near Fort Thompson, 

 P'lorida. 



Dall, Trans. Wagner Free Inst. vSci. Phila., Ill, Pt. 1, 1^.90, p. 43, 

 pi. 10, fig. 8. 



