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SUPPLEMENT TO THE CRAG MOLLUSCA. 



tions ; the outer lip is more regularly rounded, and less expanded at the lower part than 

 the lip in B. Balei, and it wants the projecting ridge at the base of the colummella. 



I have deferred giving this a regular diagnosis, but to leave it for confirmation as a- 

 species to the discovery of more specimens, and as it is most probably a shell extraneous 

 to the Red Crag, some of its congeners may make their appearance in an older 

 formation. 



Nassa pusillina, S. Wood. Supplement, p. 14, Tab. 2, fig. 7. Addendum, Plate, 



fig. 24. 



Since this name was published I have been enabled to examine some recent specimens- 

 of that variable shell Buc. variabilis, Phil. {Nassa Cuvieri, Payr), and one of its varieties, 

 appears to correspond with the fossil figured by me under the above name pusillina. Mr. 

 A. Bell, in 'Ann. and Mag. Nat. Hist.,' September, 1870, and Mr. Jeffreys in his list to 

 Mr. Prestwich's Cor. Crag paper referred this shell to N. Cuvieri, Payr., and I here adopt 

 that name in lieu of pusillina. 



Very recently Mr. Robert Bell has sent to me a specimen from the Red Crag of 

 Butley, which I have had represented in Addendum Plate, as above referred to. The 

 ribs appear only on some of the volutions, a feature which is exhibited by one of Phillippi's 

 figures of this variable species, and I have accordingly referred our present specimen to 

 Cuvieri. 



Nassa musiva ? Broc, is inserted in Mr. A. Bell's list as a species from the Red Crag, 

 and a specimen with that name has been sent to me by Mr. R. Bell. It is, however, in 

 bad condition, and appears to me to be one of the varieties of N. reticosa much rubbed 

 and worn. 



Nassa labiosa, J. Sow., from the Crag, is, I still think, distinct from B. semistriatum 

 Broc, but it seems to correspond with a shell called labiosa by Bey rich, (' Die. Conch. 

 Nordd. Tertiarb.,' p. 140, Tab. 8, fig. 5 a — c). The Red Crag specimens of N. labiosa 

 are possibly derivatives from the Coralline Crag. 



Murex insculptus, Bujard. ? Addendum, Plate, fig. 9. 

 Locality. Red Crag, Waldringfield. 



The figure referred to represents a specimen sent to me by Mr. R. Bell with the 

 above name attached to it, and he tells me that it is identical with a fossil from Italy 

 which he received from M. Seguenza with that name. I have, however, been unable to 

 find this name in any publication known to me. M. Dujardin figures and describes a 

 shell as M. exiguus in his paper on the fossils of Touraine, ' Geol. Trans, of France,' 1837, 

 p. 290, Plate XIX, fig. 2, but our shell does not well correspond with it. It appears 



