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SUPPLEMENT TO THE CRAG MOLLUSCA. 



Cardium pinnatulum, Conrad. Crag Moll., vol. ii, p. 154, Tab. XIII, fig. 3 (as C. 



nodosidum). 



Cakdium pinnatulum, Conrad. Journ. Acad. Nat. Sc., p. 260, pi. xi, fig. 8, 1831. 



— — Gould. Inv. Mass., p. 90, fig. 57, 1841. 



Localities. As in £ Crag Mollusca.' 



This in the Crag is rare to my researches. In the e Crag Mollusca ' I thought it to 

 be distinct from C. pinnatulum, differing in the number of ribs. I have, however, since 

 seen more of the recent shell, and find that in some specimens they correspond in this 

 respect, so that I have substituted the name of pinnatulum for the Crag shell. 



Cardium strigilliferum. Crag Moll., vol. ii, p. 154, Tab. XIII, fig. 5. 

 Localities. Cor. Crag passim. 



This Coralline Crag shell is given by Mr. Bell ( c Ann. Mag. Nat. Hist,,' 1870) as 

 identical with C. elegantulum, Moller, and it is also so referred by Mr. Jeffreys in his 

 list attached to Mr. Prestwich's paper. I have compared my fossil with the recent shell 

 and think that the two are distinct. The Crag shell is more tumid than the recent one, 

 and the tubercles on it are narrow and prominent, being, so to speak, perched on the 

 centre of the rib, while in the recent shell the tubercles are more properly imbrices, and 

 are broad and cover the rib. 



Cardium edule, Linn. Crag Moll., vol. ii, p. 155, Tab. XIV, fig. 2. 

 Localities. All the Upper Tertiaries of East Anglia. 



This shell first appears in the Cor. Crag, where it is very rare, and it is also rare at 

 Walton-Naze, but it is extremely common in the more recent formations. It is present 

 in the Post-Glacial beds of Kelsey Hill, March, and Hunstanton, also in the Brickearth 

 of the Valley of the Nar. 



Cardium nodosum, Turt. Supplement, Tab. X, fig. 6. 



Cardium nodosum, Turt. Brit. Biv., p. 186, t. xiii, fig. 8, 1822. 



— — Jeffreys. Brit. Conch., vol. xi, p. 283, pi. xxxv, fig. 4. 



Locality. Coralline Crag, Sutton. 



There are a number of small specimens in my cabinet which I had imagined to be 

 the young of the shell figured in * Crag Moll.,' Tab. XIII, fig. 4, as C. nodosum. This 

 shell, however, has since been referred to C. fasciatum, Mont., by Mr. Jeffreys, in which 



