344 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. [1885. 



Ostrea veleniana Conrad. 



Tertiary. Eep. U. S. & Mex. Bound. Surv., vol. i, part ii, p. 160, pi. xvii, figB. 2a, 

 h. Rev. Fo88. Ostreidae N. A., p. 314, pi. Ixx, fig. 1. Mus. No. 9902. 



Pecten altiplicatus Conrad. 



Tertiary. Rep. Expls. & Survs. R. R. R. Mississippi River to the Pacific Ocean, 

 vol. vii, p. 191, pi. iii, fig. 2. Miis. No. 13350. 



Pecten deserti Conrad. 



Tertiary. Rep. Expls. & Survs. R. R. R. Mississippi River to the Pacific Ocean, vol. 

 V, p. 325, pi. v, fig. 41. Mus. No. 8398. 



Penitella spelaea Conrad. 



Post-pliocene. Rep. Expls. «fe Survs. R. R. R. Mississippi River to the Pacific Ocean, t 

 vol. V, p. 326, pi. V, figs. 43, a, h. Mus. No. 1868. » 



Planorbis amnion Gould. 



Post-tertiary. Rep. Expls. & Survs. R. R. R. Mississippi River to the Pacific Ocean^ 

 vol. V, p. 331, pi. xi, figs. 14-16. Mus. No. 13392. 



Potamis puUatus Gould. 



Post-tertiary. Rep. Expls. & Survs. R. R. R. from the Mississippi to the Pacific, 

 vol, V, p. 333, pi. xi, fig. 23. Mus. No. 13393. 



Sazicava abrupta Conrad. 



Post-pliocene. Rep. Expls. & Survs. R. R. R. Mississippi River to the Pacific Ocean, ' 

 vol. V, p. 324 (not figured). Mus. No. 1869. 



Schizothoerus nuttalli Conrad. 



Post-pliocene. Rep. Expls. *&. Survs. R. R. R. Mississippi River to the Pacific Ocean, 

 vol. V, p. 324, pi. iv, figs. 33, a. Mus. No. 1845. 



Scutella interline ata Blake. 



Post-pliocene. Rep. Expls. & Survs. R. R. R. Mississippi River to the Pacifiqp 

 Ocean, vol. v, [pi. iv, fig. 30] (not named nor described). Mus. No. 1846. 



Tapes diversum (Sow.) Conrad. 



Post-tertiary. Rep. Expls. & Survs. R. R. R. from the Mississippi to the Pacific, vol. 

 V, p. 324, pi. iv, figs. 31, 6. Mus. No. 1847. 



TurriteUa sp. Conrad. 



Tertiary. Rep. U. S. & Mex. Bound. Surv. , vol. i, part ii, p. 163, pi. xix, fig. 8. Mus. 

 No. 9903. 



Volutalithea sayana Conrad. 



Tertiary. Rep. U. S. & Mex. Bound. Surv., vol. i, part ii, p. 162, pi. xix, fig. 6. 

 Mus. No. 9897. 



