~ GASTEROPODA. AD 
apical one, which is smooth; the coste are prominent, 10—12, and the strie are 
carried over the ribs when the surface has not been rubbed and worn. 
Pievroroma NeBULOSA, S. Wood. Crag Moll., vol. i, p. 60, Tab. VII, fig. 10, as 
Clavatula nebula. 
Localities. Red Crag, Sutton and Butley. 
Mr. Jeffreys, ‘ Brit. Conch.,’ vol. iv, p. 386, observes that this Crag shell does not 
agree with the living species xedu/a of Montague. In this I am disposed to agree with 
him, and, not being able to identify it with any other known shell, I have assigned to it 
the above name. 
Pievroroma nepuLa, Mont. Supplement, Tab. VII, fig. 7. 
Locality. Coralline Crag, Sutton. 
The above figure represents a specimen in my cabinet from the Coralline Crag of 
Sutton, of what, I believe, may be truly referred to the existing species of this name, 
agreeing with the Mediterranean variety of it. 
Fig. 9, Tab. VI, of this Supplement represents the fragment of a shell which Mr. 
Canham had obtained from the Red Crag of Waldringfield. I felt induced to have it 
figured in order to call attention to its existence, and to leave nothing unnoticed up to 
the present time that has been found in the Upper Tertiaries of the Hast of England. 
This fragment has been named and published in the ‘ Ann. and Mag. Nat. Hist., 1871, 
by Mr. Bell, under the name of PV. violacea var. gigantea — Pl. arctica, Adams. There 
were two specimens, but both unfortunately in the same mutilated condition, with nothing 
but tae last volution remaining, and this is entirely destitute of sculpture, showing only 
that it possessed a sinuation at the upper part of the outer lip. The reference of these 
fragments to violacea by Mr. Bell does not quite meet with my approval, as the shell to 
which they belonged must have exceeded an inch in length, while the longitudinal dimen- 
sions of violacea, as given by the American authors, are only ,3,ths of an inch; and there 
is no ornament on our present shell to assist in its determination. here is a fragment of 
a shell in my cabinet from the Cor. Crag (which much resembles our Red Crag shell), and 
this has distant and obsolete costa, and covered with fine spiral strize, which might have 
been upon the Red Crag shell. As Mr. Bell has given to this the name of arctica, I 
have not thought it necessary to alter it, still I think it might be called ambigua. I doubt 
its specific connection with violacea. 
