NUCULA. 15 
short. Anterior extremity rounded. Antero-dorsal margin slightly curved. 
Postero-dorsal margin short, nearly straight. Ventral margin gently curved. 
Measurements : 
Leneth ; , : : 7 mm 
Height . ; é : : 5'D A 
Thickness Red Mees 
Remaris—There are a few specimens of this small species in the British 
Museum and one or two in Mr. Meyer’s Collection. One in the British Museum 
was figured by Gardner as N. simplex, Deshayes, but it seems to me to be distinct 
from that form—it is smaller, much more triangular, and has a smaller apical 
angle. Until a larger series of specimens has been obtained I do not feel 
justified in giving this form a distinctive name. 
Distribution.—Lower Greensand of Atherfield and Shanklin. 
Nocuta Meyert, Gardner, 1884. Plate IT, figs. 21 a—e. 
1884. Noucura Mrvert, J. 8. Gardner. Quart. Journ. Geol. Soc., vol. xl, p. 130, 
pl. v, figs. 14—16. 
Remarks.—This form is at present very imperfectly known. It is small, 
triangular, and high; with lines of growth, and a large lunule. Gardner states 
that “it is most nearly allied to N. impressa of Blackdown,” but it seems to be 
almost indistinguishable from N. antiquata, Sowerby. 
Measurements : 
() (2) 
Length : : 8:5 : : 8°5 mm, 
Height : 2 8 : : le hes 
1 is the type specimen ; 2 is from Redeliff. 
Types.—In the British Museum. 
Distribution.—Lower Greensand of Atherfield; Perna-bed of Redeliff. 
