PLATE XXVII. 



Figs. 1-13. Antedon quadrata, n. sp. 



Fig. 1. Mature cirrus, . .... 



Fig. 2. Another, immature, ....... 



Fig. 3. " Small mature " cirrus, ...... 



Fig. 4. Normal young cirrus, ...... 



Figs. 5-7. Terminal, distal, and middle portions of the arms, in their dorsal aspect, 



Figs. 8-10. The pinnules on the second, fourth, and sixth brachials of a Challenger specimen, 



Figs. 11-13. The same pinnules in an Arctic specimen, . 



Figs. 14-20. Antedon australis, n. sp. 



Figs. 14-16. The pinnules on the second, fourth, and sixth brachials, 

 Fig. 17. A very young cirrus, ..... 



Fig. 1 8. " Small mature " cirrus, . 



Fig. 19. Premature cirrus, ...... 



Fig. 20. Mature cirrus, . ..... 



Fig. 21. Premature cirrus, 

 Fig. 22. Mature cirrus, 



Figs. 21, 22. Antedon hystrix, n. sp. 



166 

 166 



Figs. 23-29. Antedon phalangium, Miill., sp. 



Fig. 23. A long-jointed cirrus, .... 



Fig. 24. A short-jointed cirrus, 



Fig. 25. A long-jointed cirrus, immature, 



Fig. 26. Terminal arm-joints of a specimen from the Minch, . 



Fig. 27. The same part of a Mediterranean specimen, 



Fig. 28. The later arm-joints of a specimen from the Minch, dorsal aspect, 



Fig. 29. The same part of a Mediterranean specimen, 



