2o6 Bulletin of Laboratories of Denison University [Voi. xi 
Tellina (?) peidata^ sp. n. 
Plate XXXII, Fig. 5. 
Shell transversely and broadly sub-ovate in outline, com- 
pressed ; anterior margin more broadly rounded, posteriorly 
sub-acute. (The figure shows the posterior angle somewhat 
more acute than usual). 
The beaks are slightly nearer the anterior margin, small. 
Hinge characters unknown, except that the casts show an im- 
pressed line anterior and posterior to the beak near the hinge. 
Shell thin, marked with numerous fine concentric lines. Length 
of large individual, 2.5 inches, height 2 inches. This appears 
to be a common species in the upper part of the Fox Hills 
group but we have thus far found no description of it. The 
name may be regarded as provisional. 
Tapes cyrimeriformis , Stanton. 
Plate XXXH, Figs. 6 and 7. 
This beautiful shell is represented by two specimens, one 
from the valley east of Prieta mesa and the other from the ceph- 
alopod shales near San I^rancisco. The figure does not show 
the ligament which is probably broken. At first we supposed 
this to be a Callista. 
Caryates veta, Whitfield. 
Plate XXX, Figs. 6 and 7. 
The specimens referred to this species are from septaria 
concretions in the cephalopod shales, Rio Puerco valley. 
Tellina equilateralis, Meek. 
This shell occurs in the higher layers of the Cretaceous 
above the lignite. Upper Fox Hills. 
Idonearca (?) depressa, White. 
Plate XXXV, Figs. 2-7. 
From the same region in the Rio Puerco valley as that 
from which the original specimens came we have a variety of 
forms which have the hinge characters of Idonearca together 
