170 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 8 



PLATE 18 



Thyone neofusus, new species p. 104 



1. End plate from tube foot. 



2-3. Tables from integument. 



4-5. Supporting tables with no trace of spire. 



6. Disk of table from introvert. 



Thyone parafusus, new species p. 106 



7-9. Oblong tables with tapering spire and "handle." 

 10-11. Supporting tables with 3 pillars in spire. 

 12. Disk of table from introvert. 



Thyone bidentata, new species _ p. 105 



13-14. Tables from integument. 



15. Incipient table. 



All from type. 



16. Supporting table from a small individual less than 

 1 cm. long. 



