ox 
6. 
PLATE 7. 
1-7. Porocidaris Milleri A. Ag. 
Abactinal system of a male measuring 28 mm. in diameter; Station 3381. 
Abactinal system of a female measuring 28 mm. in diameter; Station 3381. 
Abactinal system of a female measuring 20 mm. in diameter; Station 3399. 
Abactinal system of a male measuring 18 mm. in diameter; Station 3399. 
Abactinal system of a male measuring 14 mm. in diameter; Station 3399. 
Actinal system of a specimen measuring 20 mm. in diameter, same as fig. 3; Station 
3399. 
Left anterior interambulacral plates adjoining actinal system of a specimen measuring 
28 mm. in diameter; Station 3415, 
i 
' 
: 
