PLATE XII''. 



Encope emarginata, f. 1-3- 



1. Seen from above, covered with spines, | nat. size. 



2. Seen from actinal side, denuded, | nat. size. 



3. Same as fig. 2, from abactinal side, | nat. size. 



Clypeaster subdepressus, /. 4. 



4. Young sjiecinien, nat. size, seen from above. 



