Plate 108. 

 1-9. Agassizia excentrica A, Ag. 



1. Young specimen, 5 inni. in diameter, from the actinal side ; "Blake," 1878-79, Station 



290, oft' Barbados. 



2. The same, seen from the abactinal side. 



3. The same, seen in profile, facing the left posterior interambulacnim. 



4. The same, seen facing the aual system and the odd iuterambulacrum. 



5. The abactinal side of the same, seen from the interior. 



6. A specimen, IG mm. in diameter, from the actiual side; "Blake," 1878-79, Statiou 2J1, 



off St. Vincent. 



7. The same, from the abactinal side. 



8. The same in profile, seen facing the left posterior iuterambulacrum. 



9. The abactinal system and adjoining plates of the same, seen from the interior. 



