PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. [1881 



EXPLANATION OF PLATE XXL 

 Hydroides spongicola Benedict, sp. nov. 



Fig. 13. Collar setae, enlarged 325 diameters. 



Fig. 14. Abdominal uncinus, enlarged 650 diameters. 



Fig. 15. Thoracic uncinus, enlarged 650 diameters. 



Fig. 16. Spatulate setfe of abdomen, enlarged 325 diameters. 



Hydroides protulicola Benedict, sp. nov. 



Fig. 18. Operculum, enlarged. 

 Fig. 19. Collar setae, enlarged 210 diameters. 

 Fig. 20. Thoracic unciuus, enlarged 650 diameters. 

 Fig. 21. Abdominal uncinus, enlarged 650 diameters. 

 Fig. 22. Spatulate setfe, enlarged 325 diameters. 

 Fig. 23. Outline of collar, enlarged 37 diameters. 



Crucifera Wtbsteri, Benedict sp. nov. 



Fig. 24. Disk of operculum, enlarged. 

 Fia.25. Radii, enlarged. 



