BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



Vol. 26, pp. 343-348 AUGUST 17, 1915 



PROCEEDINGS OF THE PALEONTOLOGICAL SOCIETY 



INYERTEBEATE FAUNA OF THE MORRISON FORMATION ^ 



BY T. \V. STANTON" 



{Read before the Pdleniihiluiiical Society December SO, 101.'/ > 



CONTENTS 



Page 



Lists of described species 343 



Comparison with other non-marine invertebrate faunas 344 



Wealden fauna 344 



Potomac fauna 345 



Kootenai fauna 345 



Bear River fauna 346 



DalvOta fauna 347 



Time limits of the Morrison formation as determined by associated marine 



faunas 347 



General discussion 347 



Sundance fauna 347 



Washita fauna 348 



Lists op described Species 



When, in 1SS(], C. A. AMiite- reviewed the invertebrate fauna of the 

 foi-inaiioii iiiiw known as Morrison, lie listed 2^ species, as follows: 



Unio felchii White 

 Unio toxonotuH Wliifc 

 Unio macropisthus Wliitc 

 Unio iridoidcs White 

 Unio lapilloidcH White 

 Unio HtcirnnJi White 

 Unio nucdlis M. ^indH. 



Vorticifex stearnsii White 



Talvata scohrida M. and H. 



1 ii'(/j«rM.S' fjilli M. and H. 

 *Lioplacodes veternus M. and H. 

 *Neritina nchrascensis M. and II. 



MetacypriH forhesi Jones 



Metacypris sp. 



' Conlril)iilif)n to tli<» symposiiiin lif>l(l at the Philadelphia meeting December 30. 1914. 

 Manuscript receivctl h.v the Secretary of the Society April .". 1915. 

 Published by permission of the Director of the U. S. Geological Survey. 

 = C. A. White: Freshwater invertebrates of the North American .Turassic. U. S. GeoL 

 Survey Bull. 29, 1886. 



♦ The two species marlied with an asterislc. from "near head of Wind River," probably 

 belong to a later fauna. 



XXV— Bull. Gkol. Soc. Am., Vol. 26, 1914 (343) 



