Pk\te 2. 



Fig. 1. Membranipom raiirihnni Vunn and Bassler, 1919. (p. 2:?.) 



The incrustinj; zoarium, X 20, showing the large rounded inter/.ooecial tuliercles. 



Lower Miocene (Howden horizon i: Cercado de Mao, Santo Domingo. 

 Figs. 2, 3. Acnnlhmksia snvarli forma monili/ira Canu and Bassler, 1919. (p. 32.) 



The hollow cylindrical zoarinm, natural size and < 20. The beaded structure of the mural rim 

 is apparent . 



Lower Miocene iBowden horizon): Cercado de Mao, Santo Domingo. 

 Fig. 4. HemiseptcUa lata Canu and Bassler, 1919. (p. 70.) 



Part of the incrusting type specimen, X 20, with some zooecia showing the characteristic inferior 

 denticle. 



Lower Miocene iBowden horizon i; Cercado de Mao, Santo Domingo. 

 Figs. 5-7. Nellia ociiluta Busk, 1852. (p. 55.) 



5. Normal zooecia with tubercles, complete, X 25. 



(i. I'ragment showing large zooecia, X 25; the tubercles are replaced by pores. 



7. View of fragment, X 25, showing two sides of the zoarium. 

 Lower Miocene (Bowden horizon): Cercado de Mao, Santo Domingo. 



Figs. 8-10. Conjnosti/lus ellipticus Canu and Bassler, 1919. (p. 84.) 



8. Several fragments of the articulated zoarium, natural size. 



9. Anterior face of zoarium, X 25, showing the characteristic unilamellar growth with two rows 

 of zooecia. 



10. Posterior face, X 25. 



Lower Miocene (Bowden horizon): Cercado de Mao, Santo Domingo. 

 Figs. 11-13. Corijnosti/lus labiattis Canu and Bassler, 1919. (p. 84.) 



11. Complete segment of the articulated bilamellar zoarium, natural size. 



12. Photograph of the same, X 25. The salient opesial lip is shown. 



13. Section, X 20, exhibiting the interior of the zooecia in the middle row and a longitudinal sec- 

 tion in the outer rows. 



Lower Miocene (Bowden horizon): Cercado de Mao, Santo Domingo. 

 Fig. 14. ThalamoporeUa grannlata Levinsen, 1909. (j). Gl.) 



Small fragment, X 20, identified fldth this recent species. 



Lower Miocene (Bowden horizon): Rio Gurabo, Santo Domingo. 

 Pigs. 15-19. Cupularia umhdUita Defrance, 1823. (p. 80.) 



15. The discoid zoaria, natural size. 



16. Photograi)h of the inner tuberose side, X 25. 



17. Ancestrular region, X 25, in which the ancestrula is covered over by a normal zooecium. 



18. Ancestrular region of another zoarium, X 25 ; the zooecia are arranged alternately and in invert- 

 ed order. 



19. Auotlier view of the ancestrular region, X 25; here the ancestrida is a membraniporoid zooe- 

 cium. 



Lower Miocene (Bowden horizon K Cercado de Mao, Santo Domingo. 

 Figs. 20, 21. Siiiiltitia'' hrevis Canu and Bassler, 1919. (p. 140.) 



20. Surface of the liilamellar zoarium, X 20. 



21. Ovicelled zooecia of another fragment, X 20. 



Lower Miocene (Bowden horizon): Cercado de Mao, Santo Domingo. 

 Fig. 22. Rhynchozoon vaughnni Canu and Bassler, 1919. i See also pi. 4, figs. 1, 2.) (p. 155.) 



A small fragment, X 20. 



Lower Miocene (Bowden horizon): Cercado de Mao, Santo Domingo. 

 Fig. 23. Caltopora dumerilii Savigny--Audouin, 1826 (see also pi. 1, fig. 2; pi. 12, fig. 12.) (p. 40.) 



An example, X 20 showing thick mural rims and regenerated zooecia. 



Lower Miocene (Bowden marl): Bowden, Jamaica. 



24G 



