Plate 90. 



Showing the Arrangement of the Digestive and Reproductive Organs, and the Structure 

 of the Lantern, and Auricles. 



1^. Caenopedina hawaiiensis, nom. nov. 



1. Interior view of actinal half of test with organs in place. X 1.5. 



2. Interior view of abactinal half. X 1.5. 



3. Exterior view of a pyramid from lantern. X 4. 



4. Side view of same. X 4. 



5-10. Glyptocidaris crenularis A. Ag. 



5. Interior view of actinal half of test with organs in place. Slightly enlarged, 

 (i. Interior view of ahactinal half. Slightly enlarged. 



7. Side view of lantern. X 2. 



8. Top view of lantern. X 2. 



0. Side view of a single pyramid (tooth-supporting process broken off). X 2. 



10. Part of base of corona, with auricles and apophyses. X 2. 



11, 12. Stomopneustes variolaris Agass. 



11. Interior view of actinal half of test with organs in place. Slightly reduced. 



12. Interior view of abactinal half. Slightly reduced. 



