NAPLES FAUNA IN WESTERN NEW YORK, PART 2 299 



Buchiola (?) livoniae sp. nov. 



Plate ii, fig. 1, 2 



Shell of medium size, transversely elliptic, beak subcentral, umbo not 

 elevated, surface depressed convex. Cardinal line long, sloping somewhat 

 in front. Ribs rounded, slightly flattened on top, 20 to 24 in number, sepa- 

 rated by narrower and shallow furrows ; crossed by very fine, crowded 

 elevated and slightly recurved concentric lines, scarcely visible on the 

 grooves. 



Dimensions. Length 8 mm, hight 5 mm. 



This shell is the most numerously plicate of any of the species referred 

 to the genus, and it is with some hesitation'that the species is placed with 

 Buchiola rather than with the finely ribbed group constituting Paracardium. 

 It serves to show the easy passage of one of these divisions into the other. 



Habitat. Genesee province; Naples subprovince. In the Genun- 

 dewa limestone of the Livonia salt shaft, Genesee county, and on 

 Canandaigua lake. 



A specimen from the dark Portage shales at Naples, which may be 

 somewhat distorted in outline, has similar surface characters and may repre- 

 sent this species. B. (?) livoniae is also known from the Naples fauna 

 of Allegany county, Md. 



Buchiola scabrosa sp. nov. 



Plate 10, fig. 25-28 



Shells small, highly convex, oblique, with ribs strongly elevated, 

 rounded or without elevated edges and furrows deep, smooth and not flat- 

 tened. The ornament of the ribs consists of very coarse, retrally bent 

 subangular and elevated scales over the umbonal region and these become 

 fine, delicate and obscure about the periphery. 



The species is well characterized by its ornament and will not be con- 

 founded with others of the fauna. It is suggestive of B. halli of the 

 Hamilton fauna, but the latter is a very much larger shell with irregular 

 retral festoons hemmed in by the elevated edges of the ribs. 



