DUNDEY GASTEROPODA. 41 



"We have two specimens ; one agrees with the description given 

 by D'Orbigny, except that the angle is a little wider ; the other is 

 narrowly umbilicate, but the other characters induce me to place 

 it here ; its angle too is equally wide, and the outline of the shell 

 is a little concave, so that one specimen approaches to 

 P. circumscalata, D'Orb., though it has not the groove on the 

 base of the last whorl; the other to P. mtitahilts, D'Orb., though 

 it again has not the smooth space on the base. The sinus-band in 

 this latter specimen agrees perfectly with that of the species under 

 which we have placed it ; in both specimens, the base of the last 

 whorl is flat. 



There are two specimens in the Museum; 



Locality — Dundry. Inf. Ool. 



PLEUEOTOMARIA BESSINA, D'Orbigny. 



1860 P. Bessina, D'Orb: Pal. fr. Terr! Jur. 2, Gast. 



pi: 376, p. 460. 

 Syn? 1848 P. mutabilis var patula, Desl. Mem. Soc. Linn. 



de Korm. YIII. pi. 10, fig. 12; 



Height 29 mm. Greatest breadth, 35 mm. 



This seems a good species. Ours agree precisely with 

 D'Orbigny 's description ; it is remarkable that minute characters 

 should be constant over so large an area, unless they were of 

 specific value. 



It has been already cited by Dr. "Wright from Dundry, (Q. J. 

 G. S. XYI. p. 36). 



There are two specimens in the Museum. 



Locality — Dundry. Inj. Ool. 



PLEUEOTOMAEIA AMYNTAS, D'Orbigny. 



1850 P. Amyntas, D'Orb. Pal. fr. Terr. Jur. 2, Gast. 



pi. 392, figs. 6— 10, p. 495. 



