Plate 83 



Figs. 1-11. Lunulariii lickshtirgensis Conrad. 1S47 (]>• 24f>i. 



1. Surface of a zoarium. X 20. illustrating normal .shape and arrangement of the 



zooecia and vibracula. 



2. Portion of another zoarium, X 20, showins the granular deposit of the ectocyst. 



3. Another example. X 20. with well marked fossettes on the condyles of the vibracula. 



4. An entire zoarium, X 20, showing the auoestrula at the center perforated by a pore. 



This zooecium is hydrostatic. 



5. Inner side of a zoarium, X 20, illustrating irregular arrangement of the segments. 



6. Celluliferous side of a fragment. X 20. showing margin. 



7. Edge view of a fractured zoarium. X 20. One pair of lateral septulae to each 



zooecium and minute closely arranged interzooecial canals may be noted. Two 

 segments growing in juxtaposition. 



8. Inner side of zoarium, X 20, exhibiting a regular arrangement of the segments. 



9. Inner face of a fragmentary zoarium. X 20. showing that the larva has attached 



itself to a large object. 



10. Transverse fracture, X 20, showing a large distal septula to each zooecium. The 



segments in their growth fit into each other. 



11. Zoaria, natural size. 



Vicksburgian (Byram marl) : Byram. Mississippi. 

 Cat. No. 612.55, TJ.S.N.M. 

 Figs. 12-1(5. Lunuhu-ia tintiiinhuhi, new species (p. 2.'in. 



12. Fragments of zoaria. natural size. 



13. Celluliferous side of a fragmentary zoarium. X 20. with the usual characters of the 



normal and hydrostatic zooecia. 



14. Small fragment, X 20, in which the fr;igile exterior surface has been removed from 



the lower zooecia. The vibracula of the lower layer have no condyles, and the 

 zooecial opesia of this layer are larger than those of the outer one 



15. A fragment, X 20. exhibiting the various aspects of the hydrostatic zooecia. 



16. Inner face of a zoarium, X 20. showing quite convex radi,-il rows, with large scattered 



pores. 

 Vicksburgian CRed Bluff nienil>er) : Red Bluff. Wayne County, Jlississiiipi. 

 Cat. Xo. 64256, TJ.S.N.M. 

 84 



