LIST OF THE WOOD-CUTS. 



PAGK 



Fig. 1. Opliiura teres. Lower side, jj, arm-spines 37 



" 2. Opliioglyplia Sarsii. Upper side, showing the comb of papillae at the base of the 



arm. y, upper arm-plate . . . . . . . . . .42 



" 3. Ojjhioglypha Sarsii. Lower side. /;, lower arm-plate ; /, lower part of side arm- 

 plate 43 



" 4. Ophiozona impressa. Lower side, n, genital scales G5 



" 5. Ophiocoma echinata. Chewing apparatus, seen from within, d, tooth-papillas ; 



d'\ teeth 81 



" 6. Ophiacantha spinulosa. Upper side 94 



" 7. Ojihiacantha spinulosa. Lower side ......... 94 



" 8. Ophiostigma isacanthum. Upper side. ?«, radial scale ..... 104 



" 9. Ophiostigma isacanthum. Lower side, a, mouth-shield ; i, side mouth-shield . 104 



" 10. Ophiactis Krebsii. Upper side. ^, radial shield . ...... Ill 



" 11. Ophiactis Krebsii. Lower side, h' and A'", inner lateral sides of under arm-plates ; 



/(", outer side ; 7i"", lateral side . . 112 



" 12. Amphiura occidentalis. Upper side ......... 130 



" 13. Amphiura occidentalis. Lower side 130 



" 14. Ophionereis poiTecta. Upper side js, arm-spines . . . . . 147 

 " 15. Ophionereis porrecta. Lower side, d, mouth-papillas ; r, inner point of mouth 



angle ; 7, tentacle-scale • • 148 



" 16. Ophiopsila Riisei. Upper side 150 



" 17. Ophiopsila Riisei. Lower side, f^'i tentacle-scale ; 0, genital opening . . . 150 



" 18. Ophiomyxa flaccida. Upper side 178 



" 19. Ophiomyxa flaccida. Chewing apparatus, from below 178 



