EXPLANATION OF PLATE LXIX. 



Figs. 1-5. SYRINGOTHYRIS TYPUS Winchell p. 395 



Posterior, lateral, anterior, brachial and pedicle views of a nearly 

 complete specimen. (W. M., No. 8630.) 



Burlington limestone, Pike Comity, Illinois. 



Figs. 6-9. SYRINGOTHYRIS TEXTUS (Hall) p. 399 



6-7. Anterior and brachial views of a rather small example. 8. 

 Posterior view of a larger specimen showing the syrinx. 

 9. Lateral view of another large specimen. (W. M., No. 

 13959.) 



Knobstone formation, New Albany, Indiana. 



154 



