- 177 - 



ero-dorsal or postero-ventral mar-ins. 



Dall (1) refe " "^o this forra as Pteria inornata Gabb (2) 



(1). Trails, j'ag-ner Free Inst. 3ci., Phila^^ielnhia, vol. 3, pt. 4, 

 p. 669, 189G. 



from Santo Domingo, '.'/hat is evidently? intende 1 to be the type of 

 that species is a mould impressed on a hard gray liT.estone matrix, 



[Z], Trails. Am. Philos. Soc, new ser., vol. 15, p. 255, 1875. 



altogether ^iifferent in lithological e]3.racter from the remaining 

 Santo DominjTO material, with little of the shell rem.aining; it is 

 more convex, more produ.ced posteriorly, with the anterior auricle 

 narrovjer and more acuminate. The 3hipola material whio' has been 

 described as P. ( ar--entea var.?) oh i pel ana Dall (l^) is very frag- 

 mentary; apparently the forra is less nroduced posteriorly and more 

 abru'otly inflated. 



(?). loc. ci^., -0. 669, 1838. 



Qgcurrenoc . --r^^p^ TTinr;pnfir Bov:den bR;'!s, Bov.'den, Jamaica 



(Dall, 1898). 



