Plate 4 



Figs. 1-5. Smiitina trispinosa Johnston, 1838 variety (p. 27). 



1, 2. Zoarium, natural size and base of same, X 2. 



3. Another example, X 20 with ovicelled zooecia, and also 



zooecia with small avicularia as well as those with large 

 avicularia, ornamented with a mandible. 



4. Zoarium, X 20, in which tlie zooecia do not have large 



avicularia. The small avicularia are always elliptical; 

 sometimes some of them are triangular. 

 4.1 Zooecia, X 20, without avicularia or only a single one 

 present. 



5. View by transparencj', X 85, showing the arrangement of 



the cardeUes and of the lyrule in the aperture. 

 Albatross Station D. 2813. 

 6-8. Codonella granulaia, new species (p. 29). 



6. Surface of the incrusting specimen with regular zooecia, X 20. 



7. Zoarium with irregular zooecia, X 20. The frontal granula- 



tions are quite visible between the tremopores. 



8. Lateral wall of the zooecium showing the four uniporous 



septulae, X 85. 

 Albatross Station D. 2815. 

 9-13. Pachycleithonia nigra, new species (p. 25). 



9. 10. Surface of the incrusting zoarium, X 10 and several 



zooecia, X 20. The ectocyst persists on some of the 

 zooecia as a torn film. 



11. Interior, X 20, showing the operculum in place in one 



zooecium and the condyles and lateral canals under the 

 condyles in others. 



12. Structure of the frontal, X 85. 



13. Operculum, 85. 

 Albatross Station D. 2815. 



65 



61589—29 5 



