4G0 (lEOLOClY OF THE BLACK HILLS. 



S K C T I C) N V . 



SYNOPSIS OF SPECIES FKOM THE BLACK HILLS, NOTICED 

 IN OTIIEK ^V()ltKS, NOT DESCRIBED IN THIS KEPOIIT. 



POTSDAM SPECIES. 

 Lingnlepift prima (Conrad) Meek. 



Mr. Meek recognizes a form under this name from tlie central parts of 

 tliG l^lack Hills, in the Paleontology of the Upper Missouri (Smithsonian 

 contribution), p. 8, PI. 1, Fig-. 2. 



JltfolifJies gregaria = Tkeca gregaria M. & H. 



Mr. Meek gives this species as from the Big Horn Mountains (Pale- 

 ontology of the Upper Missouri, j). 5), and we remember having seen 

 remains of a similar or identical form in the collection of Colonel Ludlow's 

 expedition of 1874. 



Agranlos f sp. ?, in Pal. Fp. Missouri, p. 10. 



Mr. Meek cites a species as above from the sandstones of the central 



Black Hills. 



JURASSIC SPECIES. - 



O.strea cuglcmnnni Meek, Pal. I^j). Missouri,, p. 73. 



A single imperfect valve of this species too poor for use occurs among 

 the fossils from southeast of Warren Peak, in the Redwater Valley. 



Trigonia conradi M. «& H., Pal. Up. ilissouri, p. 83, PI. 3, tig. 11. 



Southwest base of lilack Hills, in Lower Jurassic 

 Vnio micnlis M. & II., Pal. Up. Missouri, p. 02, Pl.;5, liy. 13. 



In Jurassic rocks, southwest base of Black Hills. 

 Astarte inornnta M. I'v 11., Pal. Uj). :Missouri, p. 94, PI. 3, fig. 12. 



Southwest base of Black Hills, in Jurassic rocks. 

 Tancrcdia f miuilateralis M. ^: IL, Pal. Up. Missouri, p. 90, PI. 3, fig. 8. 



in .Imassic beds, southwest base of Black Hills. 



