154. SUPPLEMENT TO THE CRAG MOLLUSCA. 
Macrra sonipa, Linné. Crag Moll., vol. 1, p. 245, Tab. XXIV, fig. 4. 
Localities. Cor. Crag, near Orford. Red Crag, Sutton, Bentley and Butley. 
Fluvio-marine Crag, Bramerton. Chillesford bed, Bramerton and Aldeby ? Post-glacial, 
Kelsea Hill, March, and Nar Brickearth. 
A specimen from Aldeby, sent me by Messrs. Crowfoot and Dowson, is referable 
with some doubt to this species. The specimen in the British Museum, which was the 
authority on which Dr. Woodward gave it as from Bridlington, does not seem to me to be 
a fossil of that place. It is said by Mr. Reeve to be now common at Bramerton. I 
have had figured in my Supplement, Tab. X, fig. 10, a peculiar and angular form, from 
Mr. Rose’s collection, and this came from the Cor. Crag, near Orford. 
Macrra susrruncata, Da Costa, Crag Moll., vol. ii, p. 247, Tab. XXIV, fig. 3. 
Locahties, Red Crag, Sutton? Fluvio-marine Crag, Bramerton. Chillesford bed, 
Aldeby. 
Macrra stuntorum. Crag Moll., vol ii, p. 242, Tab. XXIII, fig. 3. 
Localities. Cor. Crag, Sutton. Red Crag, Sutton and Bawdsey (Bell). Fluvio- 
marine Crag, Bramerton. Middle Glacial, Hopton ? 
This shell seems to be rare in the Fluvio-marine Crag as well as in the Red, and not to 
have occurred in either the Chillesford bed, or the Lower Glacial sands; but a fragment 
comprising nearly the whole of the anterior edge of the shell and the hinge, from the 
Middle Glacial of Hopton, seems referable to this species. 
Macrra etauca. Crag Moll., vol. ii, p. 241, Tab. XXIII, fig. 2. 
In addition to the locality given in the ‘Crag Mollusca’ I have obtained several 
valves of this species from the Red Crag at Bentley, and I have seen others in the col- 
lection of Mr. Miller, of Ipswich. Some fragments that I have from the Cor. Crag of 
Sutton may probably be referred to this species; but it is difficult to determine satis- 
factorily from imperfect specimens the difference between glauca and stultorum. 
