12 SUPPLEMENT TO THE CRAG MOLLUSCA. 



The specimen figured was lent to me by Mr. Bell, who obtained it from a dealer at 

 Orford. I have a second, but less perfect, specimen from the Cor. Crag of Sutton. I 

 have also found one in the Red Crag of Sutton, which I consider may be referred to the 

 same species. In the ' Crag Moll.,' vol. i, p. 30, this was considered as specifically different 

 from N. granulata, and the differences are there pointed out. 



N. granulata, ' Nyst. Eoss. Belg.,' p. 575, pi. xliii, fig. 11, appears to belong to this 

 species. 



Nassa pygm^a, Lam. Crag Moll., Appendix, p. 315, Tab. XXXI, fig. 5 ; Supplement, 



Tab. VI, fig. 6. 



Localities. Cor. Crag, Sutton ? Red Crag, Butley [Bell) ? Post-glacial, Nar Brick - 

 earth {Rose). 



The condition of the specimen fig. 5 of Tab. XXXI renders it doubtful whether this 

 species has occurred in the Cor. Crag. It is given by Mr. Bell (' Ann. and Mag. Nat. 

 Hist.,' May, 1871) as from the Red Crag of Butley, but I have not seen the specimen. 

 The shell figured in Supplement, Tab. VI, fig. 6, is one of a suite in excellent preservation 

 obtained by Mr. Rose from the Nar Brick-earth, and on the tablet was the name of Nassa 

 pygmcea, by Mr. Jeffreys. 



Nassa granulata, /. Sowerby. Crag Moll., vol. i, p. 29, Tab. Ill, fig. 3. 



Localities. Cor. Crag passim. Red Crag passim. Middle Glacial, Billockby and 

 Hop ton. 



Several specimens of this species, most of them very imperfect, but with their 

 distinctive characters well preserved, have been obtained from the Middle Glacial sands 

 at Billockby and at Hopton Cliff. 



Nassa incrassata, Muller. Crag Moll., vol. i, p. 29, Tab. Ill, fig. 4. 



Localities. Cor. Crag, Sutton. Red Crag, Sutton and Butley. Fluvio-marine Crag, 

 Bramerton. Middle Glacial, Billockby. Post-glacial, Nar Valley. 



I have seen this shell from the Eluvio-marine Crag of the Bramerton Pit. The 

 body-whorl and mouth of this shell have also been obtained from the Middle Glacial 

 sands of Billockby. Several specimens in fine preservation have also been obtained by 

 Mr. Rose from the brick-earth of the Nar Valley. 



