60 ALLAN HANCOCK ATLANTIC EXPEDITION REPORT 



PLATE 6 



Fig. 1. Smittina smitt'tella, new species, arrangement of zooecia, with 

 detail of ovicell and the overhanging serrated rostrum of the 

 suboral avicularium (the mandible of the avicularium is 

 hidden beneath the rostrum). 



Fig, 2. The same, a young zooecium, more enlarged, to show the 

 form of the primary aperture, lyrula and base of the unde- 

 veloped avicularian chamber. 



Fig. 3. Aimulosia floridana, new species, details of zooecia and ooecia. 



