Plate 167. 

 1-4. Spatangus pallidus H. L. Clark. 



1. Abactinal view of holotype from Sagami Bay, Japan. 



2. Left-side view of same. 



3. Actinal view of same. 



4. Posterior view of same. 



5, 6. Spatangus liitkeni A. Ag. 



5. Left-side view of small specimen from Japan. 



6. Posterior view of same. 



7-9. Spatangus paucituberculatus A. Ag. & CI. 



7. Right-side view of holotype (St. 3865). 



8. Abactinal view of same. 



9. Actinal view of same. 



10. Spatangus californicus H. L. Clark. 



10. Left-side view of holotype (St. 2973). 



All figures, natural size. 



