NORTH AMERICAN INDEX FOSSILS. 



Fig. 1340. Proclydo7tautilus triadicus^ two views and section, X Yz- (After 

 Hyatt and Smith. ) 



LIV. Hercoglossa Conrad. 



{Nautilus m part of authors.) 

 Highly involute nautilicones, with deeply-lobed sutures, broad, 

 undivided ventral saddle, and small siphuncle, centren or dorsad 

 of center. Triassic-Tertiary. 

 142. H. paucifex (Cope). (Fig. 1 341.) Cretacic. 



Fig. 1341. Hercoglossa paucifex^ lateral view of type, X / 

 (After Waller, Pal. N. J., IV.) 



