268 EEPORT UNITED STATES GEOLOGICAL SURVEY. 



11. Trapisium. Undetermined species. 



13. Idonearca shumardi Meek & Hnyden'? Exanii)les all very small. 



13. Callista pellucida Meek & Hayden. 



14. Teredo f Separated tubes only, 



15. Anisomyon alveolus Meek & Hayden. 



10. Margarita . Undetermined species. Perhaps new. 



17. Lunatia . Undetermined species. 



18. TurriteUa . Undetermined species. 



19. Aporrhais hiangulata Meek & Hayden. 



20. Spironema . Undetermined species. Perhaps new. 



21 . Pyramidella ■. Undetermined species. 



22. TiirhoniUa {Chemnitsia f) . Undetermined species. 



23. Fasciolaria (Ptestocheilus) . Undetermined species. 



24. Bacultes ovatus Say. 



25. IScaphites nodosus Owen ■? 



26. Placeniticeras placenta Bekay. 



27. Serpula . Undetermined species. 



28. Undetermined Crustacean. Probably a Brachyuran. 



The specimens of this collection have had their specific and other 

 characters much obscured by compression, and by calcareous encrusta- 

 tion. 



LIST OF CRETACEOUS FOSSILS SENT BY PROF. B. F. MUDGE, FROM 



DENNISON, TEXAS. 



1. Ostrea quadriplicata Shumard. 



2. Ostrea (Alectryonia) hellapUcata Shumard. 



3. Oryphwa pitclieri Morton. 



4. Neithea texana Ecemer. 



5. Trigonia emoryi Conrad. 



6. TurriteUa . Undetermined species. 



7. Auchura {Brepanocheilus) mudgeanus White. This species was found 



in the form of natural casts, together with those of several other 

 undetermined species, in a mass of red hematite. The mass also 

 contained i^artial casts of two or three of the species of this list, 

 showing that the hematits came from the same formation. It is 

 described and figured in another part of this volume. 



LIST OF CRETACEOUS FOSSILS SENT BY MR. G. W. MARNOCH, FROM 

 NEAR HELOTES, BEXAR COUNTY, TEXAS. 



1. Orhitulites texanus Ecemer.* 



2. Astrocosnia sancta-sabce Eoemer. 



3. Toxaster texanus Ecemer. 



4. Toxaster elegans Shumard. 



5. Diadema texanum Eoemer. 



6. Oyphosoma texana Eoemer. 



7. Cidaris hemigranosus Shumard. 



8. Rippurites texanus Ecemer. 



9. Eadiolites austinensis Eoemer. 



10. Terehratula waeoensis Eoemer. 



11. Ostrea subspatula Lyell & Sowerby. 



12. Ostrea congesta Conrad. 



13. Ostrea {Alectryonia) carinata Lamarck? 



*Tlie nomenclature of the respective authors is here used without any attempt at 

 rectificaiiou. 



