EXPLANATION OF PLATE XVIII. 



Fig. L — Pieraster tetracanthus, sp. no v. Photograph of the 

 holotype from south-east of Cape Everard to south 

 of Gabo Island, Victoria, 90-150 fathoms. Abactinal 

 view. Natural size. 



Fig. 2. — Actinal view of same specimen as Fig. L 



Fig. 3. — Asterina leptalacantha, sp. nov. Photograph of the 

 holotype from Masthead Island, Queensland. Abac- 

 tinal view. Twice natural size. 



Fig. 4. — Actinal view of same specimen as Fig. 3. 



Fig. 5. — Crossaster multispinus, sp. nov. Photograph of the 

 holotype from between Gabo Island, Victoria, and 

 Disaster Bay, New South Wales, 50-100 fathoms. 

 Abactinal view. Natiu-al size. 



Fig. 6. — Actinal view of same specimen as Fig. 5. 



