50 SUPPLEMENT TO THE CRAG MOLLUSCA. 



Cerithium ? aberrans, S. Wood. Supplement, Tab. Ill, 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 filosum, 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 C. 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. I 

 have not seen this variety from the English Crag. 



Cerithium reticulatum, Da Costa. Supplement, Tab. V, fig. 22. 



Strombiformis reticttlatus, Da Costa. Brit. Conch., p. 117, pi. 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-earth 

 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), is, I consider, quite distinct : the form of the whorls separately, as well as that which 



