BIVALVIA. LINCS 
variety) was for many years almost unique in the Fluvio-marine Crag, but it has been 
found somewhat plentifully in a newly worked pit at Bramerton. A single worn 
specimen of small size, found by Messrs. Crowfoot and Dowson, is the only instance of 
its occurrence in the Chillesford Bed. It has not occurred in the Lower Glacial sands, 
but it abounds in the Middle Glacial, both at Billockby and Hopton, where specimens of 
all sizes occur, from the smallest fry up to the ordinary size of the British shell. I have 
not seen even a fragment from that formation of those larger or more solid forms occurring 
in the Cor. and Red Crags. 
Fig. 1 d of Tab. IX of ‘Crag Moll.’ corresponds with what Brocchi has called a species 
under the name of A. znflata, and Mr. A. Bell gives P. insubricus, Broc. (violascens, 
Lam.), also as in Cor. Crag. Some specimens which I have seen that somewhat resemble 
these so-called species are, I believe, only varieties. Mr. Jeffreys, in his list of the Crag 
shells, gives glycimeris only from the Cor. Crag, but introduces P. pilosus as a new Red 
Crag shell. If these be really two distinct species I would rather reverse this determina- 
tion, and while giving pilosus to the Cor. Crag, regard that form as only derivative in 
the Red. 
Limoprsis pyemma, Phil. Crag Moll., vol. ui, p. 71, Tab. EX, fig. 3. 
Localities. Cor. Crag, Sutton, and near Orford. Red Crag, Walton, Waldringfield, 
and Felixstow. Middle Glacial, Billockby. 
This shell, according to M. Meyer (‘ Cat. Syst. Ter.,’ p. 120), is Zrzgonocelia anomata, 
Hichwald, 1830, not pygmeus, Munster, and, according to Mr. Jeffreys, it has recently 
been dredged living near Corsica, and in abysmal depths in the Atlantic. Mr. Bell gives 
the species as occurring at Walton (‘ Ann. and Mag. Nat. Hist.,’ 1870), also from Wal- 
dringfield and Felixstow. A single perfect valve has occurred in the Middle Glacial sand 
of Billockby. It is a most abundant shell in the Cor. Crag of Sutton, where the two 
valves are frequently united. 
Limopsis aurita, Brocchi. Crag Moll., vol. i, p. 70, Tab. UX, fig. 2. 
This shell is very abundant in the Cor. Crag, near Orford, but I have never found it 
in the Red Crag, with one doubtful exception. Mr. Jeffreys gives it in his list from the 
Red Crag at Waldringfield (I presume on Mr. Bell’s authority). This is given by Mr 
Jeffreys as a shell living in the Shetland seas, and though no uncommon fossil in the 
Italian beds, it has not, I believe, been yet found living in the Mediterranean. 
