346 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 11 



PLATE 8 



Figs. 1-7. Fossothuria rigida (Selenka). Large and small buttons 

 and comparatively simple table from a typical indi- 

 vidual, Panamic region. 



Figs. 8-11. Fossothuria rigida (Selenka), forma atypica. Abnormal 

 buttons from a specimen from Panama, 5 cm long. 



Figa. 1 3 13 ? — -FrfTf othu r ia -f4g*d a ( 8 dcn lca)", fuuna utypiia. ■ GoMtuiTe d 

 bodies, very unlike the regutar btitton'of '^e-typlcal 



Figs. 1J"19. Jaegerothuria inhabilis (Selenka). Buttons and tables 

 ^ from specimens from the Panamic region. Fig. 16 is a 



table from a young individual. 



(Magnification: Each division is l/lOO mm) 



