BIVALVIA. “ 143 
In his list in ‘ White’s Directory’ Dr. Woodward gives this shell from the Norwich 
Crag on the authority of a single valve in Mr. Wigham’s collection. I have not been 
able to learn from other sources of its occurrence in that Crag, and have, therefore, 
placed a note of interrogation to it. In the Middle Glacial sands of Hopton there have 
occurred many imperfect specimens, composed of the hinge and umbonal region, that 
seem referable to this species. 
Venus FascraTa, Crag Moll., vol. ii, p. 211, Tab. XIX, fig. 5. 
Localities. Red Crag, Sutton and Walton, Fluvio-marine Crag, Bramerton. 
Middle Glacial, Billockby and Hopton. 
This shell is somewhat rare both in the Red and Fluvio-marine Crags, and I have 
not met with it from any of the localities of the Chillesford bed or from the Lower 
Glacial sands. In the Middle Glacial, both at Hopton and at Billockby, it is im extra- 
ordinary profusion, but mostly in a fragmentary condition, the hinges being extremely 
abundant. Very few perfect specimens, and those only of young individuals, have 
occurred, 
Venus ovata. Crag Moll., vol. ti, p. 218, Tab. XIX, fig. 4. 
Localities. Cor. Crag passim. Red Crag, Sutton, Butley. Chillesford Bed, Aldeby. 
Middle Glacial, Billockby and Hopton. 
This shell, so profuse in the Cor. Crag, is exceedingly rare in the Red and does not 
appear to have been met with at all m the Fluvio-marine Crag, but it has been found in 
the Chillesford bed at Aldeby by Messrs. Crowfoot and Dowson. I have not seen it 
from the Lower Glacial sands, but it is common, though usually in a fragmentary 
condition, in the Middle Glacial of Hopton and Billockby, only very young specimens 
occurring perfect. 
VENUS vERRUCOSA, Zinn. 
This, in ‘ Brit. Conch.,’ vol. ii, p. 841, is given as a “ Cor. Crag species ” (S. Wood), 
but in vol. v, p. 184, it is said “not Coralline Crag.” I have not seen it, however, from 
any of the 'Tertiaries of Hast Anglia. It is, I believe, not rare in the Post-glacial 
deposit at Selsey in Sussex, and it is present, also, in the Clyde beds and Belfast 
deposit. 
