220 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



PLATE 11 



Fig. 1. Anexechona ancorata new species. Note especially the large 

 vicarious avicularia with "grappling-hook" mandibles. 



Fig. 2. Micropor'tna borealis (Busk), zooecium and avicularium. 



Fig. 3. Micropora coriacea (Esper), zooecium, avicularium and ovi- 

 cell. 



Fig. 4. Floridina antiqua (Smitt), zooecium and avicularium. 



Fig. 5. Onychocella alula Hastings, zooecium and avicularium. 



Fig. 6. The same, details of mandible. 



Fig. 7. Discoporella umbellata (Defrance), zooecium and vibracular 

 chambers. 



Figs. 8, 9, 10. The same, variations in zoarial form. 



Fig. 11. Caleschara mexicana new species, details of zooecium. 



Fig. 12. Labioporella sinuosa Osburn. 



