BIVALVIA. 153 
The localities of Thorpe, Bulchamp, and Chillesford are on the authority of the late 
Dr, Woodward’s list, and, as I have not been able to confirm them, they are given with 
doubt. A specimen sent to me by Messrs. Crowfoot and Dowson from Aldeby seems 
not to be sufficiently perfect to be free from doubt. 
Apra FaBauis, S. Wood. Crag Moll. vol. i, p. 238, Tab. MX, fig. 12: 
Dr. Hérnes has given this Crag shell as a synonym to the fossil from the Vienna 
basin, which he has called Syadosmya apelina, Kien, vol. ii, p. 77, Tab. VII, fig. 4. This 
shell, however, judging from the figure he gives, resembles Ligula profundissima, Forbes ; 
but mine is, I think, distinct from either, and I have, therefore, retained its original 
name. 
ScroBICULARIA PLANA, Da Costa. Crag Moll., vol. i, p. 235, Tab. XXII, fig. 14 (as 
Trigonella plana). 
Localities. Red Crag, Bawdsey ? Chillesford, and Sudbourn. Chillesford bed, 
Horstead, Chillesford, Tunstall Heath, and Sudbourn Church Walks. Fluvio-marine 
Crag, Bramerton. Lower Glacial, Belaugh. Middle Glacial, Billockby and Hopton. 
Post-glacial, March, Hunstanton, Nar Valley, Pentney. 
The presence of this shell on the comparison of the Bramerton and Chillesford sections 
is discussed in the introduction to this Supplement. It occurs abundantly in the newest 
part of the Red Crag and in the Fluvio-marine Crag at Bramerton. It is not uncommon 
in the Lower Glacial sands, and in the Middle Glacial sands the hinge portion of 
specimens are very abundant. In all but the uppermost part of the Red Crag (4 of the 
Introduction to this Supplement, page viii), of which it is the characteristic shell, it was 
unknown to me, but I understand from Mr. A. Bell that he has found it at Bawdsey. 
Macrra ovauis, J. Sow. Crag Moll., vol. ii, p. 246, Tab. XXIII, fig. 1. 
Localities. Red Crag passim excepting at Walton. Fluvio-marine Crag passim. 
Chillesford Bed passim. Lower Glacial, Belaugh, and Middle Glacial, Billockby and 
Hopton. Post-glacial, Kelsea Hill, Paul Cliff, March, and Hunstanton. 
This shell abounds in every part of the Red Crag, excepting at Walton and in the 
Fluvio-marine Crag in the Chillesford bed and in the Middle Glacial, but is somewhat rare 
in the Lower. 
