Explanation of Plate II. 



Sigsbeia murrhina Lym. Dorsal side of a young specimen, 

 from station 73. X 10. 



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

 two arms. X 10. 



Ophiomusium sculptum Ver. Oral side of part of the disk, 

 and bases of two arms. X 15. 



Ophiura pallida Ver. Oral side of part of the disk and bases 

 of two arms. X 8. 



Ophiodera stimpsoni Ver. One of the lower teeth. X 30. 



Fig. 4a. The same specimen. Two arm-joints from near the base of 

 the arm, ventral view. X 8. 



