366 ALLAX HANCOCK PACIFIC EXPEDITIONS VOL.10 



PLATE 31 



Figures 30-33, Lytjdamis asteriformis: Fig. 30, outer palea from type 

 of Hermella varians from Hawaii; Fig. 31, same, from specimen 

 from Puerto Rico; Fig. 32, thoracic palea from the first; Fig. 3 3, 

 thoracic palea from the second. 



Figure 34, Idanthyrsus ornamentatus: opercular palea. 



Figure 35, Idanthyrsus pcnnatus: opercular palea. 



Figure 36, Idanthyrsus armatus: opercular palea. 



Figures 37-41, Sahcllaria floridensis: Fig. 37, long palea from middle 

 of opercular series; Fig. 38, its alternating short palea; Fig. 39, 

 distal part of outer opercular palea from upper side; Fig. 40, 

 inner palea from side; Fig. 41, tip of inner palea from upper 

 side (figs. 37-41 to same magnification). 



