140 



NEW YORK STATE MUSEUM 



Diaphorostoma pastillus nov. 



Plate 32, figures 16-20 



A number of specimens have been observed of a uniformly very small 

 rotund shell of this species with a minute spire of two and one half whorls 

 barely rising above the level of the greatly expanded and inflated body 

 whorl. The dimensions do not exceed a hight of 7 mm and width of 

 6 mm. The surface carries a series of very fine concentric lines can- 

 celated by equally fine sharp revolving lines. By varying preservation or 

 in varying lights sometimes the one and sometimes the other series pre- 

 dominates in expression. 



Loxonema highlandense nov. 



Plate 32, figures 21, 22 



A slender and graceful shell attaining moderately large size, regularly 

 terete, with no slit band. The whorls are 7 to 9 in number and the sculpture 

 consists of very fine concentric lines with the grouping characterizing Loxo- 

 nema so much subdued as to give a general smoothness to the surface. 

 The sutures are low and impressed only on the earlier whorls which are 

 more regularly convex ; on later whorls the surface near the sutures is 

 flattened in a narrow band. 



This species may be directly compared with L. jersey ensis Weller 

 [Pal. Rep't N. J. 1903. 3:335, pi. 43, fig. 8-10] from the Dalmanites 

 dentatus bed at the Nearpass quarry, Port Jervis. That has the same 

 delicately lined surface but not the convex whorls without sutural flattening. 



Pterinea sp. 

 Shells of uncertain character. 



Nuculites (Ditichia) doto nov. 



Plate 33, figures 5-10 



Shell small, subtriangular, broadly rounded in front, convex on the 

 lower margin, tapering and slightly contracted behind. Anterior clavicle 

 very strong and reaching two thirds the distance across the valve. A pos- 

 terior clavicular ridge in front of the posterior muscle scar is always present, 

 broader and lower than the anterior but quite as long. 



The hinge consists of a row of denticulations and pits beginning at the 

 posterior muscle where a few large pits are divided by alternating small 

 ones, thenceforward with more uniform size and angled shape, they become 

 thin, vertical, longer and more crowded till reaching the broader surface 

 beneath the beak they show a reversed angulation and end abruptly. 



