WHITE.] CRETACEOUS FOSSILS OF COALVILLE, UTAH. 235 



14. Volsella {Brachijdonfcs) mtiltiUnigcra Meek. 



This species Avas {'oiukI in the sandstones of the first vidg;(i at Coalville. 

 I have also found exani])lcs, i)robabl.y of the same species, in ai)i)anMitly 

 equivalent strata, in the valley of liear Kiver, some thirty-live miles to 

 the northeastAvard of Coalville. 



15. Barhatia coalvillcnsis, White. 



A considerable number of examples of this species were also found in 

 the sandstones of the first ridge shown in Mr. Meek's section. It seems 

 never to luiAe been discovered elsewhere. 



IG. Macrodon f 



The examples referred by Mr. Meek to Macrodon have never been seen 

 by me. An imperfect exani])le foiuid by me, and apparently referable 

 to this genus, indicates a rather large elongate sx^ecies. 



17. Unio f 



See remarks under head of jSTo. 29. 



18. Lucina ? 



The few examples found ^^ere obtained from Ko. 3 of INIeek's section. 

 They seem to indicate a species closely allied to, if not identical with, 

 1j. svbiinduta Hall & Meek. 



11). Car dium. curium Meek & Hay den. 



The proper horizon of the t^^es of this species, which were obtained 

 by Dr. Hayden on the Gros Ventres Eiver, Wyoming, seems not to have 

 been ascertained. It is therefore of no present A'alUe for the purpose of 

 (H)rrclatiug those strata with those which contain this species at CoalviUe. 



20. Cardlum suhcurtum Meek. 



Besides the specimens obtained from ISTo. 3, of Meek's section, I ob- 

 tained others from some of the sandstones of the thiixl ridge, which is 

 much higher iu that series. I also obtained some examples of it near 

 Old Bear Iliver City, which were associated with forms which indicate 

 that the strata there belong to the Fox Hills Grouj). 



21. Cijrena curletoni Meek. 



The differences between the recognized genera Cyrena and Corhkula 

 are so slight as to be of doubtful generic importance as regards fossil 

 sliells. I am not acquainted with any species from the Cretaceous strata 

 of the West, except the one in question, that is referable to either of 

 these generic forms, the examples of which have the hinge so perfectly 

 l)reserved as to show the crenulations of the lateral teeth if they had 

 ever existed. I have, therefore, referred all such to Cyrena, although 

 in outwai'd form they closely resemble some of those Laramie shells that 

 1 refer to Corhicula. This species, however, seems to have been entirely 

 without crenulations of the lateral teeth, and Mr. Meek has no doubt 

 correctly referred it to Cyrena. As to its associates, see remarks under 

 No. 2D. 



22. Cyprimeria ? suhalafa Meek. 



The exam])les of this and the three following species collected by me 

 afford no fmther information concerning their characteristics than is re- 

 corded by :Mr. Meek in vol. iv., U. S. Geol. Sur. 40th Parallel. 



23. TeUina ? isonema Meek. 

 See remarks under No. 22. 



