Plate 69. 

 1-5. Echinocrepis setigera A. Ag. ; Station 3399. 



1. Actinostome with surrounding plates, seen from the interior, facing the odd 



ambulacrum of specimen 92 mm. in length. 



2. The same as fig. 1, seen obliquely from the interior, showing the plates of the odd 



anterior ambulacra and of the adjoining anterior inter ambulacra. 



3. Enlarged view of abactinal system of same specimen (PI. 67, fig. 2). 



4. The same as fig. 3, seen from the interior (PI. 68, fig. 2). 



5. Development of the actinal plates of same specimen, seen from the interior (PL 



fig. 1). 



