344 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 11 



PLATE 7 



Figs. 1-9. Selenkothuria theeli (Deichmann). Plates and rods from 

 skin of type, from Galapagos. 



Pigs. 10-15. Selenkothuria erinaceus (Semper) =Holothuria maren- 

 zelleri Ludwig, from the Indian Ocean. Rods and plates 

 from the skin. 



(Magnification: Each division is 1/100 mm) 



