SECOND SUPPLEMENT TO THE CRAG MOLLUSCA. 



Nassa consociata, S. Wood. 2nd Sup., Tab. IV, fig. 13 #, b; Crag Moll., vol. i, 



p. 81, Tab. Ill, fig. 7. 



Axis f ths of an inch. 



Locality. Red Crag, Waldringfield. 



The specimen figured as above referred to is said by Mr. Canhani to be from 

 Waldringfield, and is in the collection made by him and now placed in the Ipswich 

 Museum. That locality has yielded so many derivatives that I think the present shell 

 may have been introduced from the destruction of material belonging to the Coralline 

 Crag period. It is larger than any specimen I have from this latter formation, but this 

 constitutes the only difference that I can discover. 



Tab. IV, fig. 15, represents a small specimen of Nassa from the Red Crag of Butley, 

 sent to me by Mr. Robert Bell with the MS. name of N. tumida, as he considers it a 

 distinct species. This I have had figured, as it presents some differences from 

 N. incrassata (the shell to which I believe it approaches nearest) in being more ovate 

 and possessing more numerous costse, and in being smaller ; but as I do not think that 

 these suffice to distinguish the shell specifically from incrassata, I have here called it 

 var. tumida of that species. In the same Plate, fig. 12, is represented a small specimen 

 from the Red Crag of Sutton, which I think is only a dwarf individual of Nassa 

 granidata, here called var. nana; it much resembles N. granifera, but in that shell the 

 costae stand further apart with a plain space between them. In our present shell the 

 costae meet at the bases. 



Nassa angulata ? Brocchi. 2nd Sup., Tab. IV, fig. 



Buccinum angulatum, Broc. Conch. Foss. Subap., p. 654, tab. xv, fig. 18, 1814. 



Locality. Boyton. 



This is another form of the genus Nassa for which I have had great difficulty in 

 making a reference, and have given to it the above one provisionally, having seen but the 

 single specimen now figured, and this comes from a locality of doubtful age. It is from 

 Mr. Robert Bell. 



Coltjmbella ? (Asttrts) sdlculata, 8. Wood. 2nd Sup., Tab. I, fig. 3. 



Spec. Char. C. Testa turritd, elongatd, spird elevatd, apice obtusd, acuto ? anfrac- 

 tibus conveariusculis, transversim late sulcatis ; aperturd quadrato-ovatd ; labro intus denti- 

 culato ; basi truncatd, canali breve. 



