Plate 122. 

 1-4. Clypeaster lamprus H. L. Clark. 



1. Large actinal primary .spine; side view. X (i. 



2. Actinal ])riniary .spine; side view. X 6. 



3. Actinal primary spine; top view. X 2. 



4. Tip of small primary spine; side view. X 60. 



5-7. Clypeaster rotundus (A. Ag.). 



5. Tip of primary spine; side view. X 70. 

 (J. Tip of primary spine; top view. X 70. 



7. Tip of miliary spine; side view. X 130. 



8, 9. Clypeaster leptostracon A. Ag. & CI. 



8. Tip of miliary spine. X 150. 



9. Tip of primary spine. X 70. 



10. Clypeaster audouini Fourtau. 



10. Tip of miliary spine. X 100. 



11. Clypeaster speciosus A'errill. 



11. Tip of primary spine. X 70. 



12-14. Clypeaster ravenelii (A. Ag.). 



12. Actinal amhulaeral primary spine, from near mouth; side view. X 30. 



13. Actinal ambulaeral primary spine, from near mouth; top view. X 30. 



14. Actinal interamhulacral primary spine; side view. X 30. 



15. Clypeaster virescens Dod. 



15. Terminal third of marginal primary spine; side view. X 70. 



16-18. Clypeaster pallidus H. L. Clark. 



16. Tip of actinal primary spine; side view. X 70. 



17. Tip of abactinal primary spine; side view. X 70. 

 IS. Tip of abactinal primary spine; top view. X 70. 



