290 THE VOYAGE OF H.M.S. CHALLENGER. 



Fig. 11-13. Greatly enlarged views of pedicellarise. 



,, 11. Pedicellaria of the abactinal part of test. 



,, 12. One of the pedicellariae of actinal surface. 



,, 13. One of the trifid abactinal pedicellariae. 



Asthenosoma peUucidum, A. Ag. (figs. 3o, 14-17), p. 85. 

 ,, 13 a. Denuded portion of abactinal surface of test, median part (f). 

 „ 14. Portion of abactinal part of test of specimen, measuring 37 mm. 

 ,, 15. Portion of the actinal side of test of same (f). 



,, 16. Portion of the abactinal side of test of larger specimen, measuring 59 mm, (^). 

 „ 17. Portion of the actinal side of test of same specimen as fig. 16 (f). 



PLATE XVIII^ 



Phormosoma temie, A. Ag. (figs. 1-13), p. 91. 

 Fig. 1 . Interior view of aliactinal system of specimen, measuring 133 mm. in diameter (^). 

 „ 2. Same, seen from the exterior. 

 ,, 3. Segment of actinal membrane seen externally {^). 

 ,, 4. Actinal system seen from the interior, showing the extension of the main ambu- 



lacral tubes and the position of the auricles, jaws removed (f). 

 ,, 5. Same, with the jaws in place. 



„ 6. Slightly inclined view, showing the low and feeble auricles. 

 ,, 7. Jaws, seen in profile (f ). 

 ,, 8. Single jaw, seen from inside. 

 ,, 8 a. Same, in profile. 



,, 9, 9a, 96. Different pieces of the support of the jaws. 



,, 10. Part of main ambulacra! tube with lateral branches, abactinal side (f). 



„ 11. Same near the ambitus (f). 



,, 12. Portion of abactinal surface of test, adjoining the abactinal system (-^). 



,, 13. Portion of actinal sm-face of test, adjoining the ambitus (f ). 



PLATE XVIIP. 



Phormosoma luculentum, A. Ag. (figs. 1-4), p. 97. 



Fig. 1. Young specimen, measuring 18 mm. in diameter, seen from the actinal side, 

 ,, 2. The same, seen from the abactinal side. 

 „ 3, Abactinal system and segment of abactinal surface of somewhat older specimen, 



measuring 36 mm. in diameter. 

 „ 4. Segment of actinal surface of same specimen. 



