Plate 5. 



Figs. 1-5. Acanthodesia savarii forma texiurnta Reuss, 1847. (See also pi. 46, figs. 8, 9.) (p. 32.) 



1. Fragments of the ucilamellar, hollow cylindrical zoarium, natural size. 



2. Zooecia, X 20, wit)i traces of delicate spines in the opesium. 



3. Inner side of zoarium, X 20, sliowing rectangular form of zooecia. 



4. Zooecia, X 20, with a distinct rim around the ope-sium. 



5. Another surface, X 20, sliow-ing the large size of the first zooecium of a new row. 

 I;0wer Miocene fBowden marl): Bowden. Jamaica. 



Fig 6. Conopeum ovale Canu and Bassler, 1919. (p. 20.) 



Ancestrular portion of the tyve specimen, X 20, incrusting a shell . Tlie rare and irregular mtero- 

 pesial cavities, the entire, oval opesium and the flat mural rim are illustrated. 



Lower Miocene (Bowden marli: Bowden, Jamaica. 

 Figs. 7-9. GemdUporcUa puvclnta Canu and Bassler, 1919. (p. 111.) 



7. Two fragments of tlie free cylindrical zoarium, natural size. 



8 An example. X 20, showing the development of the tremocyst. 



9. Another fragment, X 20, exhiljiting the form of the aperture, ovicells (br'oken) and arrange- 

 ment of the areolae. 



Lower Miocene (Bowden marl): Bowden, Jamaica. 

 Figs 10-11. Membraniporina tenella Hincks, 1880. (p. 24.) 



10. The incrusting zoarium, X 20, illustrating the thin mural rim and tlic small tubercles on the 



gj-mnocyst . 



11. Another zoarium, X 20, ^^■ith narrow zooecia. 

 Lower Miocene (Bowden marl): Bowden, Jamaica. 



Fig r^ ITemisepteUa gnincliccllaCau\ia.ndliass\eT,UnQ. (p. 71.) 



Surface of tlie incrusting zoarium, X 20. The largest zooecia commence a new row. 



Lower Miocene (Bowden marl): Bowden, Jamaica. 

 Fig. 13. Rhamphostomella laticella Canu and Bassler, 1919. (p. 151.) 



The incrusting zoarium, X 20. The areolar costules are scarcely visible. 



Lower Miocene (Bowden marl): Bowden, Jamaica. 



249 



