SUPPLEMENT TO 'THE BIVALVIA. 23 
2. SpHENnrA? minor, Forbes. Tab. B, fig. 16 a, 4. 
Mya (Panop#a) minor, Forbes. Mem. Geol. Surv., p. 146, pl. ii, fig. 4; and p. 149, 
pl. ui, fig. 3, 1856. 
Spec. Char, “Shell transverse, compressed, elongately-ovate, very inequilateral ; the 
anterior side narrow, posterior side slightly dilate, the surface corrugated by lines of 
growth, giving it an obscurely sulcated appearance. ‘The anterior is about one third as 
long as the posterior portion, and the width about half the length. The umbones are 
nearer the anterior margin than in P. intermedia (Sow.), and the surface is less corrugated 
than in P. corrugata or even P. intermedia.’—Morris. 
Length, 1+ inch; height, 725ths of an inch. 
Localities. Bembridge and Hempstead (forbes). 
Mr. Morris, in describing Forbes’ species in the Geological Survey Memoir on the 
Isle of Wight, gives two varieties of this shell. 
I cannot myself perceive sufficient differences in this shell to justify its separation 
from angustata, J. Sow., but as I am unwilling to disturb prior determinations under the 
circumstances in which I am compelled to leave the description of the British Eocene 
Mollusca incomplete, I have retained the species here. 
