50 SUPPLEMENT TO THE CRAG MOLLUSCA. 
CrrirHium ? aperrans, S. Wood. Supplement, Tab. III, fig. 20. 
Length, an inch. 
Locality. Coralline Crag, near Orford. 
The figure above referred to is the representation of a specimen I picked out of a tray 
of shells which Mr. Henry Woodward obligingly showed to me; and who said that they 
had been found by his late brother, Dr. S. P. Woodward, and, he believed, all in 
the Coralline Crag. There was no special locality attached to any one of the specimens, 
but they had the aspect of the shells from Orford; and as the late Dr. Woodward had 
collected from the Cor. Crag only in that neighbourhood, there can be little doubt of its 
being from that locality. Neither do I think that there is any doubt as to this shell 
being a genuine fossil of the Coralline Crag. It appears to be destitute of nodules or 
thickenings in the lines of growth, which is the general character of the genus Cerithium. 
In the form of the aperture it is like a shell called Bittium jilosum, from Neeah Bay, but 
that is more elongated. I have given to my shell provisionally the above name, 
N.B.—Since the engraving was made (some years since), and before the figure could 
be compared, I regret to say the fossil was lost or mislaid, and has not since been found. 
This is unfortunate, as it was put into the hands of the engraver before the shell had 
undergone a thorough examination, trusting to future opportunity for comparison. 
CERITHIUM PERPULCHRUM, S. Wood. Crag Moll., vol. i, p. 72, Tab. VIII, fig. 10. 
This may perhaps be referred to CO. mamillatum, Riso. See Phil. “En. Moll. Sic.,” vol. i, 
p- 194, Tab. XI, figs. 11, 12. 
M. Nyst gives from the Belgian Crag, Cerithium trilineatum, Phil. var. inversum. 1 
have not seen this variety from the English Crag. 
CERITHIUM RETICULATUM, Da Costa. Supplement, Tab. V, fig. 22. 
STROMBIFORMIS RETICULATUS, Da Costa. Brit. Conch., p. 117, pl. viii, fig. 13, 1778. 
Locality. Red Crag, Walton-Naze (Bell)? Post Glacial, Nar Brick-earth. 
Several specimens of this species have been found by Mr. Rose in the Nar Brick-carth 
at West Bilney, and he has permitted me to have one of them figured. 
It was one of theNar specimens, I am informed, that constituted the authority under which 
the species was introduced into Dr. Woodward’s list of Norwich Crag shells. This species, 
though somewhat resembling the Red Crag, C. variculosum (« Crag Moll.,’ Tab. VIII, fig. 
3), 18, I consider, quite distinct: the form of the whorls separately, as well as that which 
