PLATE 31. 
Page. 
PIGs Le MERKOCERAS: APLANA TUM os: Lice se ie le sal ee cane elaine a rem ENfI 
a. 
b. 
C. 
d. 
Side view of the largest example discovered. 
Peripheral view of the same. 
Side view of another example, the volutions being somewhat 
more slender, and bearing faint transverse folds. 
Septum of Fig. 1 a, near the living-chamber. 
All of natural size. 
FIG. 2. MEEKOCERAS GRACILITATIS ...--.------..-. .----- eee Se ea SM UO Aeel 115 
a. 
b. 
C. 
d. 
Side view of a medium-sized example. 
Side view of a smalier example. 
Peripheral view of the same. 
Septum of an example larger than that of Fig. 2 a. 
All of natural size. 
AIG. 3, STEREBRA TUL AU SE MISIMP TB XG... > Seo) AS ae alee 2 ee dy a 108 
a. Ventral view; enlarged to one and a half diameters. 
d. 
C. 
Dorsal view of the same. 
Lateral view of the same. 
