470 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



51 17. Ostrea gregaria Sowerby. Plesiotype. 



Jurassic. Cordillera de Dona Ana, Chile. 



Conrad, U. S. Naval Ast. Exped. S. Hemisphere, 1855, II, p. 2S3, 

 pi. 41, fig. 1. 



23109. Ostrea haydeni White. Cotypes. 



Bear River (Cret.). Twenty miles north of Cokeville, 

 Wyoming. 



White, Bull. No. 128, U. S. Geol. Surv., 1895, p. 32, pi. 2, figs. 1, 2. 



329. Ostrea inornata Meek and Hayden. Holotype. 



Fort Pierre (Cret.). Great Bend of the Missouri below 

 Fort Pierre, South Dakota. 



Meek and Hayden, Proc. Acad. Nat. Sci. Phila., for i860, p. 1S1. — ■ 

 Meek, Rept. U. S. Geol. Surv. Terr., IX, 1876, p. 14, pi. 10, 

 fig. 4. 



9053. Ostrea insecuris White. ■ Cotype. 



Laramie (Cret.). Point of Rocks, Wyoming. 



White, Powell's Rept. Geol. Uinta Mountains, 1876, p. 112; 

 Twelfth Ann. Rept. U. S. Geol. Surv. Terr., Pt. I, 1883, p. 56, 

 pi. 2i, figs, ia, b (as O. glabra) ; Third Ann. Rept. U. S. Geol. 

 Surv., 1883, p. 421, pi. 10, figs. 3, 4 (as var. insecuris); 

 Fourth Ann. Rept. U. S. Geol. Surv., 1884, p. 307, pi. 59, 

 figs. 3, 4 (as var. insecuris). 



= Ostrea glabra. 



51 16. Ostrea irregularis Minister. Plesiotypes. 



Jurassic. Cordillera de Dona Ana, Chile. 



Conrad, U. S. Naval Ast. Exped. S. Hemisphere, 1S55, II, p. 283, 

 pi. 42, fig. 9. 



2401. Ostrea (Alectryonia) larva Damarck. Plesiotypes. 



Cretaceous. Near Ameytown, New Jersey. 



AVhite, Fourth Ann. Rept. U. S. Geol. Surv., 1S84, p. 296, pi. 42, 

 figs. 2-9. 



9822. Ostrea lugubris Conrad. Holotype. 



Cretaceous. East of Red River, New Mexico. 



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

 I 857, p. 156, pi. 10, figs. 5a, 5b. — White, Fourth Ann. Rept. 

 U. S. Geol. Surv., 1S84, p. 297, pi. 41, fig. 3. 



See Ostrea (Alectryonia) bellaplicata, and O. (A.) blackii. 



9822. Ostrea lugubris Conrad. Holotype and plesiotypes. 



22859. Colorado (Cret.). Eastern New Mexico; Huerfano Park, 



to Colorado; Sherman, Texas. 



2286 1 - Stanton, Bull. No. 106, U. S. Geol. Surv., 1893, p. 58, pi. 4, figs. 



1-10. 



20255. Ostrea lugubris Conrad. Plesiotype. 



Colorado (Cret.). Vodo del Chama, New Mexico. 



Meek, Rept. Expl. Exped., Santa Fe" to junction of Grand and 

 Green rivers, Macomb, 1S76, p. 123, pi. i, fig. ia. 



