Plate 13. 



1-8. Podophora pedifera Agass. 



1. Interior view of the actinal side, with the lantern in place, odd ambulacrum at the top. 



2. A pair of poriferous plates of the buccal membrane, facing the odd anterior ambula- 



crum. 



3. Exterior view of the odd anterior ambulacrum, at edge of the actinal system. 



4. The same as 3, seen from the interior. 



5. Right posterior ambulacrum, close to the actinal system, showing the sphseridia. 



6. Fifth plate from the abactinal .system of the odd anterior ambulacrum, abactiual side, 



exterior view, showing the arrangement of the pores. 



7. Same as 6, interior view. 



8. Ocular and abactinal ambulacral plates of the left posterior ambulacrum, seen from 



the interior. 



The figures are from same individual : 82 mm. in diameter, including the spines. 

 Outer reef, Fakarava, Paumotus, " Albatross " Ex., 1899-1900. 



