PLATE X. 



Fi". 1. DichoccEnia porcata Milne-Echv. and Haime, variety from Nassau, Bahamas, reduced four fifths. 



Fig. 2. Didioccenia porcata Milne-Edw. and Haime, portion magnified. 



Fi". 3. Dichoccenia porcata Milne-Edw. and Haime, profile view of a septum of same specimen, with 

 paliform lobe, magnified. 



Figs. 4, 5. Dichoccenia porcata Milne-Edw. and Haime, parts of another specimen, magnified. 



Fi-^. 6. Dichoccenia porcata Milne-Edw. and Haime, profile view of septum of preceding specimen, mag- 

 nified. 



Fi". 7. Dichoccenia porcata Milne-Edw. and Haime, two primary septa and intermediate secondary seen 

 from above, magnified. 



Fig. 8. Dichoccenia porcata Milne-Edw. and Haime, horizontal section through two calicles, showing solid 

 filling up of outer part of chambers. 



Fi<T. 9. Dichoccenia porcata Milne-Edw. and Haime, vertical section throiigh a calicle showing dissepi- 

 ments. 



Fig. 10. Dichoccenia porcata Milne-Edw. and Haime, part of another specimen with more pointed septa, 

 magnified. 



Fig. 11. Dichoccenia porcata Milne-Edw. and Haime, .septum of preceding specimen in profile, magni- 

 fied. 



Fig. 12. Dichoccenia porcata Milne-Edw. and Haime, part of specimen from Cumana with crowded 

 and prominent calicles, magnified. 



Fig. 13. Dichoccenia porcata Milne-Edw. and Haime, septum of preceding specimen in profile, magnified. 



Fig. 14. Dichoccenia porcata Milne-Edw. and Haime, part of a specimen from Nassau, with coarsely 

 granulated ccenenchyma, magnified. 



Fig. 15. Dichoccenia porcata Milne-Edw. and Haime, septum of preceding specimen in profile, magnified. 



