Plate 115. 



Fig. 1. Siviiiaiopora excavans, new species (p. 656). 



The tj-pe-specimen, X 25, showing growth upon a shell which it excavates. 



Middle Jacksonian (Castle Hayne limestone) : AVilmiugton, North Carolina. 

 Cat. No. 65274, U.S.N.M. 

 Figs. 2-6. Plagioecia olobidosa. new species (p. 713 1. 



2. Fragments of the cylindrical, hollow zoariuni, natural size. 



3. A hollow zoariuni, X 12, in which the Iiroken ovicell permits a view of the sulijuoent 



peristomes. 



4. A tubular, ovicelled zoarium, X 12. incrn>;tiiig an alga at the ramification of tlie 



frond. 



5. Extremity of the hollow brancli, X 12. showing tliat the zoarium surrounds a deli- 



cate radicell of an alga. 



6. The same specimen, X 25, illustrating aspect of zone of growth. 



Middle .Jacksonian (Castle Hayne limestone) : Wilmington, Nortli Carolina. 

 Cat. No. 6.5275, U.S.N.M. 

 Figs. 7, 8. Dia/jeroecia lonfiicaudn, new species (p. 741j. 



7. Portion of the type zoarium, X 12, sliowing Probosciiia form of growtli. 



8. Another part of the type, X 12. terminating in the Bcrrnicea form of growth and 



bearing an ovicell. 

 Middle Jacksonian (Castle Hayne limestone) : Wilmington, North Carolina. 

 Cat. No. 65276, U.S.N.M. 

 Figs. 0-11. Stomatopora poUjgona, new species (p. 6.50 1. 



9. A young zoarium, X 12, growing over a larger species of Stomatopora. 



10. The same specimen, X 2.5. 



11. An older zoarium, X 6, illustrating tlie polygons formed by the branches. 

 Middle .Jacksonian (Castle Hayne limestone) : Wihningtou, North Carolina. 



Cat. No. 65277, U.S.N.M. 

 116 



