Plate 43. 



Showing the Arrangement of the Digestive and Reproductive Organs. 



1, 2. Porocidaris variabilis A. Ag. and CI. 



1. Interior view of abactinal half of test, with organs in place. Nat. size. 



2. Interior view of actinal fialf. Nat. size. 



3, 4. Salenia Pattersoni A. Ag. 



3. Interior view of abactinal half of test, with organs in place, x 3. 



4. Interior view of actinal half. X 3. 



5, 6. Salenocidaris miliaris A. Ag. and CI. 



5. Interior view of abactinal half of test, with organs in place. X 3. 



6. Interior view of actinal half. X 3. 



