314 
PALEONTOLOGY OF NEW YORK. 
Formation and locality. In the upper beds of limestone, at the Falls of the 
Ohio, of the age of the Hamilton group, near Louisville, Ky. 
Nucula Neda. 
PLATE XLV, FIGS. 3, 4. 
Nucula Neda, Hall and Whitfield. Twenty-fourth Ann. Rep. N. Y. State Mus. Nat. Hist., p. 191. 1872. 
“ “ “ “ Hall. Pal. N. Y., vol. v, pt. 1. Plates and Explanations: PI. 45, 
fig-s. 3, 4. 1883. 
Shell of medium size, rhomboid-ovate, cuneate, length about one-fifth greater 
than the height; basal margin broadly rounded ; cardinal margin sloping to 
the anterior and posterior extremities, which are abruptly rounded. 
Valves gibbous, with the umbones ventricose. 
Beaks a little more than one-third the length of the shell from the anterior 
end, prominent and incurved. 
The surface has been marked by fine, concentric striae. 
The cast shows strong anterior and posterior muscular impressions, with 
three or four umbonal muscular scars and a narrow protractor scar just within 
the cardinal line, and anterior to the posterior muscular area, as usual in the 
genus. 
The number of teeth cannot be determined, but there are as many as six 
or eight on the posterior side, with a distinct ligamental cavity, in the cast, 
beneath the beak. 
The specimen described has a length of 21 mm., and a height of 17 mm. 
This species is of the size and form of Nucula levata, of the lower Silurian 
rocks, and differs but little from Nucula bellistriata, of Conrad. 
Formation and locality. In the hydraulic limestone of the age of the Hamil¬ 
ton group, near Louisville, Ky. 
