UNIVERSITY OF CALIFORNIA PUBLICATIONS 



BULLETIN OF THE DEPARTMENT OF 



GEOLOGY 



Vol. 5, No. 3, pp. 67-70 ANDREW C. LAWSON, Editor 



FOSSIL MOLLUSCA FROM THE JOHN DAY 

 AND MAS CALL BEDS OF OREGON. 



BY 



Robert E. C. Stearns, 



Honorary Associate in Zoology, United States National Museum. 



Several years ago the writer examined a collection of shells 

 obtained by parties from the University of California collecting 

 in the John Day region, under the direction of Professor J. C. 

 Merriam. A note on this material, with preliminary descriptions 

 of new forms, was published in Science, 1 but without figures. It 



1 Science, N. S., Vol. 15, p. 153, 1902. 

 was intended at that time to republish the descriptions with fig- 

 ures at a later date. The following notes are in the main a re- 

 production of the articles from Science with the addition of fig- 

 ures of the new species. 



Professor Merriam 's collection includes examples of the sev- 

 eral species of land-shells heretofore described, 2 namely, Epi- 

 pliragmophora fidslis cmticedens, Polygyra Dalli, Ammonitella 

 Yatesi praecursor, and Pyramidula perspective simillima. Of 

 these four species there are numerous specimens and fragments. 

 Dr. AVhite's Unto Condom was also obtained in considerable 

 numbers. The foregoing represent all of the molluscan forms 

 thus far reported from the John Day beds. Dr. White received 

 his material from the late Professor E. D. Cope and Professor 

 Thomas Condon, of the University of Oregon. Cope's specimens 

 were obtained by Mr. Jacob L. Wortman, of the Army Medical 

 Museum. These two collections included the same species. 



Professor Merriam has made some interesting additions to the 

 above brief list which are described below. 



2 C. A. White, Bull. U. S. Geol. Surv., No. 18, 1885; E, E. C. Stearns, 

 Proc. Wash. Acad. Sc., Vol. 2, p. 651, 1900. 



