Plate LXVII Continued. 



PAGE. 

 Fig. 4. T.SNIODICTYA SUBBECTA Ulr 630 



4 and 4 a. Specimen of this species, natural size, and portion x9. 



4 6. The central ranges of zooecia apertures, x!8. 



4 c. Casts of zooecia, x!8, showing strong constriction anteriorly due to the 



superior hemiseptum. 

 4 d. Casts of marginal zooecia, x!8. 



St. Louis group, Elizabethtown, Ky. 



E. O. Ulrica's collection. 



Fig. 5. T.ZNIODICTYA FBONDOSA Ulr. (See also PI. LXIX.) 



Fragment of the zoarium of this species, natural size. 

 Illinois State Museum. 



