Tig. 
Wig. 
-1 
DH 
PLATE VY. 
PAGE. 
THE AMMO S  COLUMBLAINAS |Tv ESTD srw cle setsise sete loue raisers a 183 
A free cheek. Columbia, Locality 210 A. 
Dorsal view and profile in outline of a large cranidium. 
Same localhty. 
A perfect pygidium. Same locality. 
TSOLDE US CANAUTLS) «(WAKE he istic ie ecsv enon susteisicy ene stots otuaeoiers 132 
Cephalon restored in outline from an incomplete free cheek. 
Columbia, Locality 210 A. 
Pygidium restored in outline. Same locality. 
CYRTOCERAGH SD SelM ett crescteleeseie sche clover sieueits a eifatsce tose aes sil 
Lateral view of a weathered specimen, showing the septa 
and the slightly-curved shell. Columbia, Locality 
210 A. 
Cross-section of another specimen partially restored. This 
is probably a distinct species from the last. Same 
locality. 
(395) 
