114 THE NAUTILUS. 



Cyclemis Raf. , loc. cit. Species C. viinutissima and C. oliv- 

 acea, undescribed. C. oUvacea here selected as type. Undeter- 

 minable, but the type may be Viviparus iniertextus Say. 



Omphemis Raf. , loc. cit. Species 0. lacustris and 0. phaiozis 

 Raf., undescribed. Type 0. lacustris here selected ; not deter- 

 minable, but provisionally it might be identified with Viviparus 

 contedoides W. G. B. I think that Cyclemis and Omphemis were 

 based, at least partly, on Viviparus. 



LoMASTOMA Raf. , loc. cit. Monotype L. terebrina Raf. Not 

 determinable. Imaginary ? 



EuTREMA Raf., loc. cit. Monotype E. terebroides Raf. 

 Mythical ? 



DuPLicARiA Raf . , Ailantic Journal etc., No. 5, p. 165, 1833. 

 Monotype D. bonariensis 'Ra.i.=Chilina fluminea (Maton). 



Summary. 



Ambloxis will have to be used for the genus commonly known 

 as Melantho or Campeloma ; Campeloma, and in part, Ambloxus, 

 becoming synonyms. 



Pleurocera replaces Angitrema (of Tryon's monograph), at 

 least for species congeneric with verrucosa. (Pleurocera oi Tryon 

 will become Ceriphasia Swainson). 



Leptoxis will replace Ancidosa. 



All of the other names which I have been able to identify 

 become synonyms of genera of earlier dates. 



A COLOS-MAKKED EUCONOSPIRA FROM THE PENNSYLVANIAN OF 



MISSOTIRI, AND A LIST OF REFERENCES TO COLORATION IN 



FOSSIL SHELLS. 



BY DARLING K. GREGER, COLUMBIA, MO. 



An examination of the extensive series of Penns3'lvanian 

 fossils from the vicinity of Kansas City, Missouri, in the Uni- 

 versity of Missouri collection, brings to light two specimens of 

 gastropods retaining traces of coloration. The material comes 

 from the oolitic layer of the Drum member. The oolite is light 

 buff or gray and the greater number of its many fossils are of 

 the same light color. The shell which I figure on the accom- 



