NAPLES FAUNA IN : -WESTERN" NEW YORK, PART 2 239 



at the margin but one in the same space. The entire surface shows 26 



plications. Though these elevated lines are actually continuous throughout 



their extent and are not increased in number except on the very early parts 



of the shell, they are gracefully sinuous in their course over the valve and 



are interrupted at irregular intervals by concentric growth lines, in addition 



to which are very fine crenulating lines of ornament. The species is rare, 



and the single specimen observed is a left valve measuring 23 mm in hight; 



15 mm in greatest length. 



Habitat. Genesee province; Naples subprovince. Base of Hatch hill, 



Naples. 



Lunulicardium encrinitum sp. no v. . . 



- . Plate 2, fig. 20 



Shell of medium or small size ; outline orbicular or subtriangular ; 

 apex back of the middle line ; sical margin slightly incurved and extending 

 for about two thirds of the antelateral margin. Surface depressed convex, 

 sloping pretty evenly in all directions, most abruptly to the posterior 

 margin. Surface markings consist of 35 to 40 fine, somewhat flattened 

 striae separated by narrow sulci, and crossed by minute concentric striae. 

 A normal example has a hight of 1 1 mm, and a length of 10.5 mm. 



Habitat. Genesee province ; Naples subprovince. This species has 

 been observed only in the thin calcareous Melocrinus layer which lies in 

 the Genesee shales above the horizon of the Styliola limestone. The 

 exposure of this bed in the Blacksmith gully, Bristol, Ontario co., has 

 furnished several specimens. 



Lunulicardium pilosum sp. nov. 



■Plate 2, fig. 23,-24; plate, 4, fig. 8, g - , '.'.'.. 



Shell of medium to large size, length and breadth equal. Beaks 

 posterior of the axial line ; lateral marginal slopes diverging at an angle 

 of 75 . The sical margins are long, extending for a little more than half 

 way down the shell, their actual length being four fifths the length of the 

 valve. Their margin is distinctly though: not deeply incurved, the sical 

 walls narrow, but they are not ■"■ greatly ■'- arched, and the -hiatus is.coTise- 



