204 Bulletin of Laboratories of Denison University [voi. xi. 
Exogyra texana, Roemer. 
Specimens apparently of this species occur in sands above 
the lignite in Rio Puerco valley. 
Exogyra winclielli, White. 
Fragments from the upper Fox Hills group near Una de 
Gato east of the Sandia range have been referred with some 
hesitation to this species. 
Gryphaea vesiculans, Lam. 
Plate XXX, Fig. 3. 
This is a common species. Elaborate discussions by Gabb, 
Hill and other writers seem to have brought no agreement as 
to its synonomy. Gabb, in 1869 referred this form to G. pitch- 
eri of Morton and identifies it with G. dilata van tucumcarii of 
Marcou. Whitfield reported it in 1885 from the lower green 
sand marls of New Jersey though insufficient care on the part 
of collectors prevented him from determining the sequence of 
the varieties. The species probably has a large vertical range. 
There are large quantities of these shells exposed by the weath- 
ering of shales below the Punta de la Mesa sandstone east of 
Mount Taylor. This is the locality from which it was reported 
by White in 1875. Meek also received it from the Fort Pierre 
group of the Black Hills. 
Inoceramiis fragilis, Hayden and Meek. 
Plate XXX, Fig. I and Fig. 2. Plate XXXIV, Figs. 3, 4 and 5. 
Our specimens vary greatly in form and size but scarcely 
more than those figured by Stanton and White. Very common 
in the cephalopod shales and the Punta de la Mesa sandstone 
just above them. Figure 2 of Plate XXXV is from a cast of the 
interior and differs from the others in form but is associated with 
other casts which are more elongate and in other characters re- 
semble this species. These are from shales east of the Caballo 
mountains. 
