98 SUPPLEMENT TO THE CRAG MOLLUSCA. 
Greenlandica, 1780. A specimen of the more ovate variety, Cowthowyi, has been obtained 
from the Red Crag of Butley by Mr. A. Bell, and is represented in the figure in Tab. VI 
of this ‘Supplement.’ 
ScaLarta vAricosa, Lamarck. Crag Moll., p. 90, Tab. VIII, fig. 14. 
Localities. Cor. Crag, Sutton. Red Crag, Walton, Waldrinefield, and Sutton 
(Bell). 
This shell is evidently the same as 8. caterrupta, J. Sow., ‘Min. Conch.,’ tab. 577,. 
fig. 3. The specimen there figured is said to have come from the Eocene of Barton Cliff: 
Mr. F. E. Edwards, whose Eocene collection is unrivalled, tells me that he does not know 
the shell as an Hocene species, S. ix¢terrupta of Dixon’s ‘ Geol. of Sussex’ being obviously 
a different shell. It is therefore most probable that the specimen figured in ‘ Min. 
Conch.’ was from the Coralline Crag, the colourmg of the figure being that of the Cor. 
Crag specimens. I should have been disposed to refer the Crag shell to Brocchi’s pumicea, 
but it does not quite agree with either his or Hornes’ figure of that species, and’I have had 
no opportunity of comparing the shells themselves. Should it prove distinct then, inasmuch 
as Lamarck’s varicosa is generally regarded as the same as pumicea, | would suggest for 
our Crag shell the name of Scalaria funiculus. 
Mr. Bell (Amn. and Mag.,’ Sept., 1870) gives the shell from the Red Crag of 
Walton, Waldringfield, and Sutton. 
Mr. Jeffreys, in his List to Mr. Prestwich’s Coralline Crag Paper, says that Scalaria 
subulata is a variety of S. foliacea, and this again a variety of frondosa, but in the Red 
Crag Paper (p. 496) he corrects this and says that swbulata is a distinct species, and 
that Mr. McAndrew had dredged it off Teneriffe. It would seem from this that if a 
distinct Crag form is found living it is a species, but if not, then it is only a variety. 
ScaLARIA SEMICosTATA, J. Sowerby. 
A specimen of this, since the foregoing ‘Supplement’ went to press, has been sent to 
me from the Red Crag by Mr. Charlesworth. Although in the greatest perfection, this 
specimen can only, I think, be a derivative from the Eocene. 1 shall figure it in the 
concluding part of the ‘Supplement.’ 
TROPHON ELEGANS, Charlesworth. 
Very recently the fragment of a shell from the Coralline Crag near Orford has been 
sent to me by Mr. Cavell, and this, I think, may be referred to Zrophkon elegans of 
