180 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.8 



PLATE 23 



Pachythyone fseudolugubris, new species p. 116 



1-2. Supporting tables from ventral tube feet of specimens 

 few cm. long. 



3-5. Knobbed buttons from inner layer of integument. 

 6. Knobbed plate from outer layer seen from the inter- 

 nal side (the reticulated external layer is not drawn). 



Pachythyone lugubris (Deichmann) p. 116 



7-8. Elongate knobbed buttons from inner layer of integu- 

 ment. 

 9. Supporting table from ventral tube foot. 



Pachythyone rubra (H. L. Clark) p. 115 



10. Supporting table from ventral tube foot. 

 11-12. Knobbed buttons from inner layer of integument. 



