LIST OF ILLUSTRATIONS. 



Page. 

 FIG. 1. Pectinura anchista. X 3.5. a, from above; 6, from below; c, side 



view of three arm joints near disk 24 



2. Ophiarachnella megalaspsis. X 4. a, from above; 6, from below; 



c, side view of three arm joints near disk 26 



3. Ophioconis diastata. X 6. a, from above; 6, from below; c, side 



view of three arm joints near disk 28 



4. Ophioconis papillata. X 6. a, from above; 6, from below; c, side 



view of an arm joint near disk 29 



5. Ophioplocus japonicus. X 3. a, from above; 6, from below; c, side 



view of three arm joints near disk 31 



6. Ophiozona elevata. X 6. a, from above; b, from below; c, side 



view of three arm joints near disk 32 



7. Ophiozona platydisca. X 4. a, from above; 6, from below; c, side 



view of three arm joints near disk 34 



8. Ophiozona polyplax. X 3. a, from above; 6, from below; c, side 



view of two and a half arm joints near disk 35 



9. Ophiura kinbergi. X 5. Showing disk scaling and arm comb 37 



10. Ophiura micracantha. X 4. a, from above; b, from below; c, side 



view of two arm joints near disk '48 



11. Ophiura macula ta; adult, a-c X 5; young, d-f X 7. a and d, from 



above; b and e, from below; c and/, side views of arm joints near 



disk : 50 



12. Ophiura leptoctenia. X 5. a from above; 6, from below; c, side 



view of three arm joints near disk 51 



13. Ophiura quadrispina. X 5.5. a, from above; b, from below; c, side 



view of two arm joints near disk 56 



14. Ophiura bathybia. X 3.3. a, from above; b, from below; c, side 



view of three arm joints near disk 58 



15. Ophiura flagellata, young. X 6. a, from above; b, from below; 



c, side view of two arm joints near disk 61 



16. Ophiura clasta. X 3.5. a, from above; 6, from below; c, side view 



of two arm joints near disk 64 



17. Ophiura monostcecha. X 5. a, from above; b, from below; c, side 



view of three arm joints near disk 66 



18. Ophiura calyptolepis. X 4. a, from above; 6, from below; c, side 



view of two arm joints near disk 68 



19. Ophiura cryptolepis. X 2.5. a, from above; 6, from below; r, side 



view of two arm joints near disk. 69 



20. Ophiura nodosa; variety from Icy Cape, Alaska. X 6. a, from above 



6, from below; c, side view of base of arm 72 



21. Ophiura oediplax. X 10. a, from above; b, from below; c, side 



view of three arm joints near disk 74 



XI 



