Plate 75. 

 Araeosoma eurypatum A. Ag. and CI. 



1. Actinostome and base of corona, somewhat damaged. X 1.3. 



2. Abaotinal system. X 2. 



3. Actinal ambulacral and interambulacral plates, five millimeters from ambitus. X 1.5. 



4. Abactinal ambulacral and interambulacral plates, just above ambitus. X 1.3. 



