Platk 7. 

 1-7. Porocidaris Milleri A. Ag. 



1. Abactinal system of a male measuring 28 inin. in diameter; Station 3381. 



2. Abactinal system of a female measuring 28 mm. in diameter; Station 3381. 



3. Abactinal system of a female measuring 20 mm. in diameter; Station 3399. 



4. Abactinal system of a male measuring IS mm. in diameter; Station 3.399. 



5. Abactinal system of a male measuring 14 mm. in diameter; Station 3399. 



6. Actinal system of a specimen measuring 20 mm. in diameter, same as fig. 3; Station 



3,399. 



7. Left anterior interambulacral plates adjoining actinal system of a specimen measuring 



28 mm. in diameter; Station 3415. 



