No. 1614. 
NEW AND OLD CARBONIFEROUS FOSSILS—GIRTY. 303 
10. 
il, 
NG, Ik 
SD 
=I 
. A characteristic specimen with both valves in place. Ventral view X 2. 
. Dorsal view showing the narrow hinge and the spines along the margin 
of the ventral valve X 2. 
. View obliquely down into the interior of a ventral valve, showing the 
spines developed within the cavity X 2. 
A specimen showing faint costs. Dorsal view X 2. 
Ventral view X 2. 
Anterior view of a large specimen with concentric spiniferous layers 
at the aperture X 2. 
Pennsylvanian, Lasalle, Illinois. 
PLATE XXII. 
Tegulifera kansasensis, new species. 
A slab of limestone containing two specimens. Side view showing one 
of them X 2. 
Side view showing both specimens. The apical portion has been broken 
off in both instances X 2. 
. Ventral view of apical cap of one of the specimens represented by figure 
2. There seems to be a flattened area of attachment X 4. 
. View of internal or dorsal side of same X 4. 
. A large specimen preserved in a manner similar to the last. Posterior 
view with the apical cap attached X 2. 
Lower or ventral side with apical cap attached X 2. 
Same with apical cap removed. What is here shown is the inner sur- 
face of the dorsal valve with the ventral valve surrounding it X 2. 
Piqua limestone, Crane, Kansas, 
