Plate 64. 

 1. Homolampas hastata A. Ag. 



1. Specimen 32 mm. in length, fragment showing tlie left anterior ambulacrum above « 



ambitus and adjoining plates ; Station 330.3. 



2-5. Bchinolampas depressa Gray. 



2. Actinostome and plates surrounding it, of specimen 4 mm. in length, seen from 



interior of the test ; " Blake," 1878-79, Station 253, off Grenada 92 fms. 



3. Actinal plates of odd anterior ambulacrum of the same, seen from the exterior. 



4. Abactinal system and plates surrounding the same, seen from the interior. 



5. Abactinal system and plates surrounding the same. 



G-8. Neolampas rostellata A. Ag. 



6. Actinal system and surrounding plates of specimen 10 mm. in diameter; "BL 



1877-78, Station 5, off Key West 229 fms. 



7. Abactinal system of same. 



8. Abactinal system of same, seen from the interior. 



