DTJNDRY GASTEROPODA^ 23 



Length, if complete, 40 — 45 mm. 



Shell acute, spire of numerous whorls, which are angular near 

 the upper part, i.e.^ there is a shoulder giving a turreted form ; 

 the whorls are crossed by strong rounded transverse costse and 

 finer longitudinal lines; the keel on the last whorl is sharp. 



Our specimen is imperfect and shows no spines, nor any wing ; 

 still the part of the mouth and columella which is preserved 

 points to its being an Alaria, while the shape of the whorls and 

 the ornamentation agrees with the foreiga type, as far as we may 

 judge from descriptions. 



It is said to be common near Nancy, in the Murchisoni and 

 Sowerbyi zones. 



We have only one specimen. 



Locality — Dundry. Inf. Ool. 



LITTOEINA ^DILIS, Muenster. 



1844 Turbo aedilis, Muenster. Goldf. Petr. Germ. tab. 

 194, fig. 9. 



1864 Seebach. Hann. Jura. p. 47. 



1869 Brauus. Mittel-Jura. p. 180. 



Length, 13 mm. 



Shell acute ; whorls six, with three longitudinal elevated 

 bands, crossed by numerous sharp transverse costse, which rise 

 into tubercles where these cross. 



Our shell agrees with the description of the type, except that 

 ours is more regularly conical, but we do not consider this an 

 important difference, as the ornamentation appears precisely the 

 same. 



"We prefer to place it under the genus Littorina. 



There are four specimens in the Museum. 



Locality — Dundry. Inf. Ool. 



It is cited by Seebach, as well as by Brauns, from the 

 Oxfordian beds of N. Germany. 



