Smith.] -jiO [Oct. 2, 



and m, the others under Fig. 1 belonging to the Devonian species, 

 which McCojr proposes should retain the name C. Jiystericum Schlot- 

 heim. Phillips* proposed to transfer the name G. aliforme to the Devo- 

 nian species, but the type originally described by Sowerbj' under that 

 name is undoubtedly the Carboniferous species. 



This species is found all over Europe, in the Carboniferous, chiefly 

 Mountain Limestone, but owing to the confusion that exists on the Con- 

 tinent one cannot usually tell whether this means Upper or Lower Car- 

 boniferous or both. 



Nine specimens were found in the Lower Coal Measures of Conway 

 county, 5 N., 10 W., section 17, centre of the north half. They were 

 found in a ferruginous shale, and although in the form of casts they 

 show the sculpture of the surface with unusual clearness, even the deli- 

 cate, wavy growth lines being as sharply defined as on the original 

 shell. The specimens all had a length of more than one inch, the 

 dimensions of the largest being : length, 1.30 inch ; diameter, 0.88 inch ; 

 width of the cordate area, 0.62 inch. 



Genus Edmondia de Koninck. EdmoncUa neirascensls Geinitz, Meek, 

 U. 8. Geol. Survey Nebraska, p. 214, PI. x. Fig. 8. Astarte nehras- 

 censis Geinitz, Garbon. und Dyas in Nebraska, p. 16, PL i, Fig. 25. 



A few poorly preserved specimens from the Tipper Coal Measures ot 

 Poteau mountain, Indian Territory, seem to belong to Meek's Nebraska 

 species. 



Edmondia unionif or mis VlnWi^^, Geol. Yorkshire,Yo\.\\,'\).'iO^. Edmon- 

 dia unioniformis (?) Meek and Worthen, Paleont. Illinois, Vol. ii, p. 

 346, PI. xxvii, Fig. 6. 

 An imperfect cast from the Upper Coal Measures of Illinois was 



doubtfully referred by Meek and Worthen to the European species. 



The Arkansas specimens agree fairly well with Meek's figures and much 



better with his descriptions, except that they have the concentric ribs 



coarser. 



Occurrence. — Numerous casts were found in the Lower Coal Measures, 



"Millstone Grit," of Conway county, 8 N., 17 W., section 33, northeast 



quarter of northeast quarter at Cook's stone quarry. 



Class Olossophora. 

 Subclass Scaphopoda. 



Genus Dentalium Liuntcus. Dentalimn conf. meekianum, Geinitz, 

 Carbon, u. Dyas in Nebraska, p. 13. 

 This species was described from the Permo-Carboniferous of Nebraska, 

 and was also found in the undoubted Upper Coal Measures of Illinois. 

 Imperfect specimens were also found in the Upper Coal Measures of 

 Crawford county, Arkansas, 10 N., 30 W., section 10, southeast quarter 

 of northwest quarter. 



* Pal. Foss. Cornwall, Devon, and M'est Somerset, p. 33. 



