552 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



PLATE 42 



Fig. 1. Stephanosella b'taperta (Michelin), infertile zooecium with 



aperture, lateral-oral avicularia and areolar pores. 



The same, ovicell and frontal avicularium. 



Stephanosella bolin't new species, zooecium, aperture, oral 



and frontal avicularia. 



The same, ovicell and avicularia. 



The same, operculum. 



Stephanosella vitrea new species, infertile zooecium, aper- 

 ture and avicularia. 



The same, ovicell. 



The same, operculum. 



A'tmulosia palliolata (Canu and Bassler), different degrees 



of calcification of the ovicell. 

 Fig. 10. The same, marginal zooecium with details of aperture, 



spines, avicularium and encircling umbo. 

 Fig. 11. The same, operculum much enlarged. 



Fig. 12. Hippoporidra granulosa Canu and Bassler, marginal zoo- 

 ecium showing spines, aperture and frontal granulation. 

 Fig. 13. The same, very advanced calcification. 

 Fig. 14. The same, operculum much enlarged. 



