544 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



PLATE 38 



Fig. 1. Arthropoma cecilt (Audouin), zooecium and ovicell. 



Fig. 2. The same, details of aperture. 



Fig. 3. The same, operculum. 



Fig. 4. Arthropoma circiiiata (MacGillivray), zooecium and ovicell. 



Fig. 5. Schizomavella auriculata (Hassall), zooecium, ovicell and 



small elevated oval avicularium. 

 Fig. 6. Scliizoma'vella auriculata ochracea (Hincks), zooecium with 



oval avicularium not elevated. 

 Fig. 7. Scliizoma'vella auriculata acuta new variety, with small 



pointed avicularium and frontal granules. 

 Fig. 8. The same, with large pointed avicularium. 

 Fig. 9. The same, with long narrow avicularium, young and with- 

 out granulation. (Figs. 7, 8 and 9 all from the same colony.) 

 Fig. 10. Schizomavella porifera (Smitt), zooecium, ovicell and large 



median avicularium. 

 Fig. 11. Stylopoma informata (Lonsdale), infertile zooecium. 

 Fig. 12. The same, showing enormous ovicell in comparison with 



zooecia. 

 Fig. 13. Schizolavella vulgaris (Moll), zooecium with ovicell and 



lateral avicularium. 



