PLATE 18. 



Ophiahachna affinis Liitken. Samoa. 



Fig. 1. Aboral view. X 1.3. 



2. Oral view. 



Ophiozonoida picta H. L. Clark. Wellington, N. Z. 



3. Aboral view. X 8. 



4. Oral view. 



Ophiarachnella macracantha H. L. Clark. Ponape, Caroline Islands. 



5. Aboral view. X 1.66. 



6. Oral view. 



Ophioderma variegatum Liitken. Aqua Verde Bay, Lower California. 



7. Aboral view. X 2.5. 



8. Oral view. 



Pectinura fallax (Peters). Zanzibar. 



9. Aboral view. X 2. 

 10. Oral view. 



