Plate 24 



Page 

 Figs. 1-6. Holoporella tubulosa, new species 147 



1. Portion of a regular cylindrical zoarium, X 20. 



2. Zooecia of a unilamellar specimen, X 10. 



3. Several zooecia of same specimen as Figure 2 X 20. 



4. A free cylindrical colony, X 10. Some of the peris- 



tomes are indented in front. 



5. Zooecia of the same, X 20 



6. A specimen with ectocyst, X 20. An ovicelled zooe- 



cium is present. 

 Albatross Station D. 2405(2,3) D. 2160(1) D. 2319 (4,5). 

 Gulf of Mexico. 

 7,8. Holoporella magnifica Osburn, 1914 143 



7. Surface X 20 



8. Surface, X 20, with ectocyst present but broken in 



places. 

 Albatross Station D. 2405, Gulf of Mexico. 



189 



