14 DTJNDET GASTEEOPODA. 



others of intermediate size. As this punctation is not described 

 by the Prench author, it is perhaps hazardous to refer our shells 

 to the foreign type. It is preferable however to forming a new 

 name uselessly. Shells agreeing with our fig. 4 are named in 

 the Museum of the Geological Survey as N. pundura, Eean ; 

 these belonged apparently to Dr. Lycett's collection. They do 

 not disagree perhaps with the cut given. by Eean of his shell 

 (Ann, Mag. Nat. Hist, 1839, III., p. 62), but he makes no 

 mention of punct^. I cannot, however, imagine them to be the 

 same as the shell figured by Lycett and Morris (Great Ool. Moll, 

 pi. 15, fig. 18) ; their figure wants the separation of the whorls 

 by the flat ledge at the sutures, though the description agrees in 

 some other points. Those who have access to the originals must 

 decide. 



Some may be disposed to make two varieties in this species. 

 The larger form (fig. 2) corresponds in shape with N. Pictaviensis 

 D'Orb., but it is encircled with several spiral lines, at unequal 

 distances, which give an obscurely polygonal aspect to the last 

 whorl especially. The flat space at the sutures is almost plane, 

 scarcely excavate. The smaller form (fig. 4) has the spire more 

 acute. The whorls seem to be free from the spiral prominent 

 lines, and the suture is a little more hollowed out like a canal, 

 instead of being flat. 



Oppel cites N. Pictaviensis from Burton Bradstock, (Jura., p. 

 384). Remains of epidermal colour remain in both our figured 

 specimens, as transverse bands, alternately light and dark. 



There are fifteen specimens in the Museum, with the shell 

 more or less preserved, besides numerous internal casts. 



Locality — Dundry. Inf: Ool. 



ErSPIEA ZELIMA, D'Orb.? PI. 1, fig. 1. 



1850 Natica Zelima, D'Orb. Pal. fr., Terr. Jur. 2 



Gast. pi. 290, fig. 8. 

 Height 41 mm. Breadth 26 mm. 



