Bulletin 35 
202 
.S4 
Page 175 
terior side short, its teeth few and small ; margins dentate. 
Pliocene, Matura. 
Area centrota n. sp. 
Transversely subrhomboidal, with a strong wide carination 
running from the umbo to the posterior angle ; ornamented 
with many (36-38) squamosely nodose radiating ribs each 
with a fine subsidiary thread-like rib in the narrow inter- 
stice ; anterior margin short, rounded ; posterior margin 
strongly sinuate, angulate above with the hinge-line and 
forming a more rounded angle wnth the strongly crenate 
lower margin. Hinge-teeth small in the middle of the 
.straight hinge, but becoming larger and diverging consi- 
derably towards the angles ; ligamental area more or less 
grooved, especially anteriorly. 
Pliocene, Matura. The nodosities on the ribs are ar- 
ranged, at least on the disk, in regular longitudinal rows, 
and the intermediate thread-like ribs are wanting on the cen- 
tral portion, becoming developed anteriorly and posteriorly. 
Cupularia calyx-glandis n. sp. 
A crateriform" species allied to C. pyriforme and C. Owenii 
but distinguished by its more completely cup-shaped form. 
The details of the cells are not ver>’ easily made out from 
my specimens, but thej- seem to resemble C. pyriforme in 
general arrangement. 
Lower Miocene, Manzanilla. 
Pecten anguilleiisis n. sp. 
Shell fan-shaped, ornamented with radiate muricate striae, 
and about loor ii prominent rounded ribs, which are crossed 
by concentric striae, the concave interstices broader than the 
ribs. Upper valve nearly flat, lower one gently concave. 
