Clahk. — Brittle-Stars. 



PLATE 4. 



Ophioderma squamosissimum Liitken. Tobago. 

 Fig. 1. Bit of disk and base of one arm. X 4. 



Ophioplocus bispinosus H. L. Clark. Holotype. Victoria: Westernport. 

 Fig. 2. Aboral view of disk and basal half of one arm. X 4. 



Ophiactis cyanosiic'a H. L. Clark. Holotype. Tobago. 



Fig. 3. Aboral view. X 4. 

 Fig. 4. Oral view. 



Ophiactis lymani Ljungman. Tobago. 



Fig. 5. Aboral view. X 4. 

 Fig. 6. Oral view. 



