PLATE 25. 
Page. 
Fig. 1. ANOMIA GRYPHORHYNCHUS ..---- Meiers aiafate sycleveiaioners salcisioeesen oe unter 57 
a. Exterior view of an upper valve; natural size. 
b. Lateral view of the same. 
c. Exterior view of two examples; upper valves. 
» 
Fig. 2. ANOMIA MICRONEMA .---- 2 bieldiat Sie) a/sih lS otc NV aay pO RET as eee ee ay 57 
a, Exterior view of an upper valve, showing the radiating lines of 
the usual character; natural size. 
b. Another example, showing coarser lines. 
e. Another, larger, example, upon which the radiating lines are obso- 
lete or absent. 
d. Interior view of another example, showing the process beneath the 
beak for the attachment of muscles. 
All upper valves. 
JOG, By WOM IBIEAN (ERY ACiara DONNA) IRIXGRODE/SHS) Sod ooo ob ocod Seen enosance sacoce 58 
a. Right valve; natural size. 
Fig. 4. VOLSELLA (BRACHYDONTES) LATICOSTATA. ---.-- UN Mh aes a INA ass 59 
a. Right valve; natural size. 
Pic. 5. CORBICULA CARDINIZNORMIS..--.------.-.-- area Wis BS ER eae I ie 
a. Left side view; natural size. 
b. Dorsal view of the same. 
KE, Gy CORBGGUON SOIC ONMENS so2555 cososcdcouses Bist LILY SLs te NE See 80 
a. Left side view of an example from Crow Creek, Northern Colorado. 
band c. Left and dorsal views of another example from the same 
locality. 
d. Meek’s type of C. crassatelliformis, from Hallville. 
eand f. Different views of two of Meek’s types of C. tropidophore ; 
from near Point of Rocks Station, Wyo. 
