786 Report or THE State GEOLOGIST. 
Pexidella, Bittner. 1890. 
Smooth, biconvex shells, with both valves greatly thickened in 
the umbonal regions. Spiral cones directed laterally ; juguin much 
reduced and situated in the umbonal region; saddle scarcely 
Fias. 328-330. Pexidella Strohmayeri, Suess (sp.). (BrirTNER.) 
developed ; intercalary lamella narrow and extending for nearly 
the entire length of the principal coils. 
Type, Pexidella Strohmayer, Suess (sp.). 
Distribution. Triassic. 
Diplospirella, Bittner. 1890. 
Smooth, biconvex shells with thickened valves. Jugum well 
developed, situated posteriorly ; saddle narrow, having the form 
of an oblique stem from the posterior extremity of which are 
Fias. 331-333. Diplospirella Wissmanni, Miinster (sp.). (BITTNER.) 
given off the intercalary lamella, which are broad, serrate on 
the outer margin and coextensive with the principal coils. 
Type, Diplospirella Wissmanni, Minster (sp.). 
Distribution. Triassic. 
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