This species, varyiug a little, is very common in the Alum Clay at Whitby; it is mostly dark coloured calcareous marie, shining with pyrites. The Ammonites are called in common Snake-stones, and superstition has accounted for their having been found constantly without heads, saying, the curse of St. Cuthbert was the cause of it; but as some of the dealers felt it a possible inconvenience, they were determined to be less barbarous, and compassionately supplied some with heads. I was so curious as to desire to see what sort of heads might be substituted, and Lady Wilson kindly procured me a specimen when at Whitby. I have figured that specimen for the information of others ; see fig. 2. The beatiful Keynsham Ammonites are also called Snake-stones, having been changed into stone by some devotee for the benefit of his brethren. Fig. 3 is a small specimen, showing something of the section and septum, which is nearly round, exclusive of the space occupied by the inner whorl. This species is perhaps among the fossil Ophiopomor* phites of Plott. BUCCINUM, Linn. &c. Gen. Char. Univalve; spiral; oval , or elongated ; aperture nearly longitudinal,, oblong., with a reflected sinus at the base of the columella,-Columella plain,, tumid. ' Immense masses of these shells have been found near Devizes: they are of a greyish colour, and so much attached to each other, that it is difficult to distinguish the valves, and pairs nearly detached are rare. Mr. Sheffield has fine specimens, which 'he was so good as to lend me; for others I am indebted to Mrs. Gent. A greyish Limestone often fills the insides* and sometimes partially coven the outsides. '* In a quarry near is the cone-coral Limestone mentioned in British Mineralogy, vol. 2, tab. 149, passing into striated Limestone or striated Spar, the local term for which is 44 Charrow-bed." Pickeridge Hill* mentioned before at pp. 177, 190, and 228, is in the parish of Corflfe, four miles S. of Taunton, Somersetshire.