6 SUPPLEMENT TO THE CRAG MOLLUSCA. 



specimens found by me are all more or less in a mutilated condition, and I regret to say 

 that my knowledge is not improved by the sight of any better than I then possessed. 

 I am induced to have it figured because the specimens have the lithological character of 

 the Red Crag shells ; and although it is a species probably derived from an older 

 deposit than the one in which it was found, it has not the appearance of the known 

 derivative fossils from the older tertiaries, and I think it is just possible to have lived in the 

 Coralline Crag sea and been derived from that Crag. My specimens differ slightly from the 

 Highgate fossil ; the costae upon the Crag shell are rather closer, thicker, and more obtuse, 

 and the volutions not quite so convex, with the intermediate striae closer and not so fine, but 

 the Crag specimens will not admit of fair comparison. Our shell seems to agree rather 

 better with the figure and description given by M. Deshayes (' An. sans Vert, du Bass, de 

 Par.,' t. iii, p. 461, pi. 92, figs. 4 — 7), which is more slender, and the costae a little 

 larger, with the striae closer ; the long rostrum there shown has not been preserved in 

 any of our British fossils. The figure given by Sowerby of the Bracklesham shell 

 (Dixon, ' Geol. of Sussex/ p. 187, tab. v, fig. 21) much resembles the Crag specimens. 



Ancillaria glandiformis ? Lam. Supplement, Tab. V, fig. 7. 



Locality. Red Crag, Waldringfield. 



Another shell, most probably derived from some anterior deposit, has been 

 obligingly presented to me by Mr. Charlesworth, who obtained it from the nodule pits in 

 the Red Crag at Waldringfield. It is in a very mutilated condition, but I think it may 

 be referred to Ancillaria glandiformis, Lamarck, ' Ann. du Mus.,' tab. xvi, p. 305. 

 It seems to correspond with fig. 7, a, b, tab. vi, Toss. Moll, des Wien. Beck/ vol. i, 

 where Dr. Homes has figured several varieties of the species. My specimen is in a 

 similar condition to most of the Red Crag shells in respect to lithological character. 



Voltjta nodosa ? /. Soioerby. Supplement, Tab. V, fig. 6, a, b. 

 Voluta nodosa, J. Sow. Min. Coneh., tab. 399, fig. 2. 



Locality. Red Crag, Waldringfield. 



A single specimen, which I have referred as above, has been obtained by the Rev. Mr. 

 Canliam from the nodule diggers in the Red Crag at Waldringfield ; it is in all probability 

 a specimen derived from some anterior formation, perhaps from the same bed which has 

 supplied to the Crag the specimens of Bostellaria lucida. 



Our specimen has undergone considerable water action, as most of the exterior orna- 

 ment is obliterated. Mr. Edwards speaks of this older Tertiary species being very variable, 

 and has represented several different forms (' Eocene Moll.,' p. 141, Tab. XIX, fig. 1) ; he 

 gives it as a species from the London Clay at Highgate, and also from the Bracklesham 

 beds. 



