37 
PHOLADOMYA hesterna. 
TAB. DCXXIX. 
Spec. Char. Elliptical, transverse, gibbose, slightly 
curved, obscurely ribbed ; ribs about 12, com- 
posed of small tubercles ; beaks near the small 
anterior extremity. 
Syn. Pholadomya candidoides, 8. V. Wood , Ann. 
and Mag. Nat. Hist. v. 6. 245. 
Strongly resembling the recent P. Candida , but the 
posterior extremity is more rounded and the ribs smaller. 
Some specimens are so much longer in proportion to their 
width, and so distorted by fracture, that it is difficult to di- 
stinguish them from P. Dixoni ; the short and more curved 
anterior margin may assist in such cases. (See the lower 
figure.) The specimens are in Mr. Wood’s matchless 
collection, and are from Ramsholt near Woodbridge. I 
have ventured to alter the name with Mr. Wood’s consent, 
candidoides being only provisional and not regularly 
formed. 
