LTIKDRY GASTEROPODA. 39 



1850 Pleurotomaria punctata, D'Orb. Pal. fr. Terr. Jur. 



2 Gast. pi. 399, figs. 



11—13, p. 513. 

 1858 Quenstedt. Jura. tab. 



57, fig. 8. 



Length — one specimen attains 40 mm. Ereadth 32 mm. Angle 

 of spire 53?. 



This seems the commonest species at Dundry. The shell is 

 conical, the outline straight- sided ; usually the whorls are not 

 distinctly separated by a marked suture ^ — indeed, the suture 

 scarcely interrupts the outline; the encircling bands are not 

 markedly salient; the sinus-band is the most prominent, it is 

 elevated, with 2 — 3 concentric lines on it, crossed by curved 

 lines ; this is not seen in D'Orbigny's figure, his specimen being 

 probably a poor one. If there is an umbilicus, it must be a very 

 narrow one. 



I fancy that P. AUionta, D'Orb., may be a synonym of this 

 species ; the absence of spiral lines round the umbilicus is 

 probably not a constant character. 



There are a dozen specimens in the Museum. 



LocaKties — Dundry and Yeovil. Inf. OoL 



Professor Quenstedt regrets the number of species that have 

 been described by D'Orbigny, saying that it is difficult to judge 

 under which of these Glerman specimens should be placed. I 

 fancy if the specimens from Suabia were in as good a state of 

 preservation as the French there would be no difficulty. Our 

 Dundry specimens go to prove the validity of most of D'Orbigny's 

 descriptions. 



PLEUEOTOMAEIA SANDERSII, n. sp. PI. 3, fig. 1. 



Height, 38 mm. Greatest breadth, 32 mm. Angle of 

 spire, 60°, 



