Pars 18 Polygyrella 357 



1883 Planorbis lunatus, White, (83a) Annual Report of the U. S. Geol. 



Survey III, (1882), p. 448, tab. XXXII, fig. 24—25. 

 1885 Gonostoma yatesi, White, (85a) Bull. U. S. Geol. Survey No. 18. 



p. 180, tab. III, fig. 8—12 (non Cooper!). 

 1887 Arnmonitella yatesi, Gooper, (87a) Bull. California Acad. Sc 



1887, p. 355 (non Cooper ante!). 

 1894 Ammonitella Yatesi, Stearns, (94a) Proc. U. S. National Mu- 



scum XVI, (1893). p. 748 (non Coopcr!). 

 1900 Ammonitella Yatcsi praecursor, Stearn6, (OOa) Proc. Washing- 



ton Acad. Sc. II, p. 656, tab. XXXV, fig. 9—12. 

 1902 Ammonitella Yatesi praecursor. Stearns. (02a) Science (New 



York) N. S. XV, p. 153. 

 1906 Amraonitclla Yatesi praecursor, Stcarns, (06a) University of Ca- 



lifornia Publ. Bull. of the Departm. of Geol. Vol. V, No. 3, 



p. 67. 

 1909 Planorbis lunatus, Grabau and Shirner, (09a) North American 



Index Fossils. Inverlebratee. I, p. 820, Textfig. 1206y, z. 

 1912 Ammonitclla lunata, Hannibal, (12a) Proc. of the Malacological 



Soc. of London X, p. 159. 

 Vorkommen: U. MiocSn, Aquitanien: John Day Beds: 



Bridge Creek (Oregon). 





