Explanation of Plate III. 



Fig. 1. Ophiomusium eburneum L/ym., var. elegans Ver. Dorsal 

 side of part of disk and bases of two arras. X 6. 



Fig. la. The same. Ventral side of a part of the disk and the bases 

 of two arms. X 8. 



Fig. 2. Ophiozona nivea, var. compta Ver. Ventral side of a part of 

 the disk and of two arms. X 8. 



Fig. 3. Ophiomyxa brevicauda Ver. Ventral side of a part of the 

 disk and bases of two arms. X 8. 



Fig. 4. Amphipsila maculata Ver. Ventral side of disk and base of 

 an arm. X 8. 



Fig. 4<z. The same specimen. Side view of three rows of arm-spines 

 from the middle of an arm. X 15. 



Fig. 5. Ophiomyxa tumida Lym. A lower tooth. X 30. 



