GASTEROPODA. 33 



Locality. Red Crag, Waldringfield. 



This is another shell for the notice of which I am indebted to Mr. Canham. It is 

 from the Red Crag at Waldringfleld. It is probably a derived specimen, and has been 

 much rubbed and water-worn, but there is enough of it left, I think, to justify the 

 reference. It is the only specimen I have seen. 



Pleurotoma turrifera, Nyst. Crag Moll., vol. i, p. 53, Tab. VI, fig. 1 (as P. turricula, 



Brocch.). 



Localities. As in ' Crag Moll.' 



This, so far as I know, is confined to the Red Crag. The specimens I found were 

 not restricted to the " Coprolite " bed, but were obtained from various parts of the Red 

 Crag. They are all more or less rubbed and worn, and are probably derived specimens. 

 I have seen nothing more perfect than those previously figured. This is quite distinct 

 from Mure® turricula, Mont-., and as this latter has precedence in date, our present shell 

 must have its name changed. M. Nyst proposed to call the present shell Pleurotoma 

 turrifera, and I have adopted his proposition. 



Pleurotoma nodifera, ? Lamarck. Supplement, Tab. VII, fig. 6. 



Pleurotoma nodifera, Lam. Hist, des An. sans Vert., 2nd edit., t. ix, p. 353. 



Locality. Red Crag, Waldringfleld. 



The specimen figured is from the nodule workings at Waldringfleld, and is in a 

 mutilated condition, its true character being obscured. It is probably an extraneous 

 fossil, but it has the colour of the true shell of the Red Crag. The nearest species I can 

 compare it with is the above, but it is very doubtful, and I am unwilling in its present 

 state to consider it a new species. The specimen has one row of prominent nodules 

 (fourteen in the last remaining volution), between which and the suture is a shallow and 

 curving sinus, as shown by lines of growth. PL nodosa, Bellardi, has a similar row of 

 nodules, but the form of that shell is different. The specimen is from the cabinet of Mr. 

 Canham. 



Pleurotoma inermis, Partsch. Crag Moll., vol. i, p. 55, Tab. VII, fig. 1, as P. 



porrecta. Supplement, Tab. Ill, fig. 2 a, b. 



Pleurotoma inermis, Partsch, 1842, fide Homes. 



— — Homes. Foss. Moll., Vienna, vol. i, p. 349, t. xxxviii, fig. 10, 



1856. 



— nivale ? Loven. Ind. Moll. Scand., p. 14, 1846. 



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