ACAD ii Xee Ar: 
PLACENTICERAS STANTONI var. BOLLI Hyatt. 
(Page 214.) 
Fic. 1. Sectional view of specimen represented by Pl. XL, figs. 6 and 7. 
Restored section of same. 
Living chamber of a larger specimen. 
Last suture of same specimen. 
6,7. Living chamber of another specimen. 
Horton’s mill, Dallas County, Tex.; Taylor beds (?), Upper Cretaceous; Coll. Mus.. Comp. Zool., 
wo 
Ex ES) 
I 
Cambridge. 
Bist: 
