42 DUNDEY GASTEROPODA. 



Height 40 mm. Greatest breadth, 33 mm. Angle of spire, 

 about 58^^. 



Most of our specimens agree so well with the descriptions of the 

 type, that we have little hesitation in placing them here. One a 

 little larger (50 mm. in height) has the last whorl slightly con- 

 cave between the suture and the sinus-band, bat the apical whorls 

 of the same are like the other specimens. ' 



There are eight specimens. 



Locality—Dundry. Inf. Ool. 



PLEUEOTOMARIA ALLICA, D'Orbigny. 



1847 P. AUica, D'Orbigny, Prodrome I., p. 268. ' 



1850 D'Orbigny, Pal. fr. Terr. Jur. 2, Gast. 



pi. 390, p. 490. 



Height, 40 mm. Greatest height, 32 mm. Angle of spire 

 about 54° 



Shell conical, not umbilicate ; whorls slightly convex, with a 

 rounded angle close to the suture, so that a ledge is formed, 

 where one whorl joins the other. The whole surface of the shell 

 is minutely cancellate from the decussation of spiral raised lines 

 and oblique transverse ones; the latter slope in different 

 directions on the two sides of the sinus-band. Sinus-band in 

 middle of the whorl, broad, elevated, crossed by curved lines, 

 and with two spiral finely dotted lines. Base of last whorl 

 slightly convex, surface cancellated like the rest of the shell. 



This shell agrees in form with the French one; if the 

 ornamentation seems to differ it is probably merely that ours is 

 better preserved. 



Our dificulties in deciding what is a species would be much 

 less if all specimens were found in an equally good state with the 

 present one. 



There is only one specimen in the Museum. 



LocaKty — Dundry. Inf. Ool. 



