82 SUPPLEMENT TO THE CRAG MOLLUSCA. 



Conchology,' however, insists that this Crag shell is distinct from the living papillosas 

 {granulatus). 



In ' Supplement,' Tab. V, fig. 14, 1 have shown a specimen from Walton Naze, which 

 represents another of the various forms of this shell, and which in its granulations seems 

 undistinguishable from the recent papillosus, but is much flatter, and without any 

 convexity in the whorls. Under these circumstances I have thought it best provisionally 

 to place the shell shown in the above figure, and in figures G, a, b, c, of Tab. XIII of 

 1 Crag Mollusca/ as a new species under the name noduliferens. 



Whether T. granulatus, from Walton Naze, in Mr. Bell's list (' Annals and Mag. Nat. 

 Hist.,' September, 1870), presents any nearer approach to the living shell I know not, as 

 I have not seen the specimen. 



Dr. Woodward gives Trochus granulatus, Born {similis Sby.), in his list of 

 Norwich Crag shells in ' White's Directory,' as from Bramerton and Thorpe, on more 

 than one authority. But whether the recent granulatus, or the above shell now called 

 noduliferens is meant I am unable to say. 



Fragments of a granulated Trochus occur in the Middle Glacial of Hopton that may 

 belong either to this shell or to pajjillosus (granulatus). 



Trochus bdllatus, Phil. ? Crag Moll., vol. i, p. 124, Tab. XIII, fig. 4 (as T. zlzyjjJdnus, 



var. monslrosa) ; Suppl., Tab. VII, fig. 20. 



Trochus bullatus, Philippi. Moll. Sic, p. 226, vol. ii, t. xxviii, fig. 8. 



Localities. Cor. Crag, Sutton and near Orford. Red Crag, Walton Naze. 



The specimen figured in ' Suppl.,' Tab. VII, was obtained by me some years ago 

 from the Reg Crag of Walton. It differs altogether from zlzypkinus in the tumidity 

 of the whorls and in the presence on them of faint granulations (which, however, rather 

 resemble diagonal sculpturing than granulations), and in these particulars the shell seems 

 identical with the figure and description of Philippi's species bullatus. I have 

 also a half- grown specimen from the same locality. The shell figured in ' Crag 

 Mollusca,' Tab. XIII, fig. 4, as zlzypkinus var. monstrosa, from the Coralline Crag, 

 Sutton, appears to be the same species, and Mr. Bell observes ' Ann. and Mag. Nat. 

 Hist.,' May, 1871, that "he has obtained two specimens, one decorticated (similar to 

 the shell figured in the 'Mon. Crag Moll.,' Tab. XIII, fig. 4), from the Cor. Crag, Gedgrave, 

 and that Prof. Sequenza had sent him a series of Philippi's T. bullatus in all stages of growth 

 and preservation, and a close comparison of their sculpture and form enabled him to 

 correlate the Italian and Crag shells/' Mr. Bell showed me the series thus obtained, and, 

 as it seemed to bear out the view thus expressed, I have inserted the species from both the 

 Coralline and Red Crag. 



