PLATE X. 



The same Letters occur in both Figures. 



br. The plug of calcareous tissue iu the centre of the radial funnel, which was called a basal rosette by Sars. 

 vrf. The ventral radial furrows of the calyx. 



Figs. 1, 2. Rhizocrinus lofotensis, Sars. 

 Two views of a calyx with three of the first brachials remaining m situ. 



Fig. 1. From above, 



■'o 



Fig. 2. From the side, ...... 



Figs. 3-20. Rhizocrinus rawsoni, Pourtales. 



Fig. 3. Calyx of a specimen from near the Azores ; side view, 

 Fig. 4. The same from above, .... 



Fig. 5. The same from below, .... 



Fig. 6. Calyx of a specimen from off Havana, with the first brachials 



remaining ?H s^Vh ; from above, . . . . x 10 254 



Fig. 7. A similar view of the calyx of another Havana specimen which 



has undergone reparation. All the first brachials are 



visible and four of the small second brachials ; while the 



centre of the cup is occupied by the oral plates, . 

 Fig. 8. Calyx of another specimen from the Azores with the first 



brachials attached ; from above, .... 

 Fig. 9. Upper face of the top stem-joint of the Azores specimen repre- 

 sented in figs. 3-5, ..... 

 Fig. 10. Upper face of the fourth joint of the same stem, 

 Figs. 11,12. Terminal faces of two joints from rather above the middle 



of the stem ; fig. 12 representing that nearer the calyx, . x 15 26 



Figs. 13, 14. Terminal faces of two joints from the lower part of the 



stem ; fig. 13 representing that nearer the root. 

 Fig. 15. The root of a specimen from Havana, 

 Fig. 16. Two stem-joints with attached Foraminifera (TnmcatuUna 



lohatula), ...... 



Fig. 17. Proximal face of an epizygal at an arm-syzygy, 



Fig. 18. Distal face of the corresponding hypozygal, . 



Fig. 1 9. Dorsal view of the second and two following brachials, to show 



the backward projection of the proximal face of the second 



brachial (an epizygal), ..... 

 Fig. 20. Side view of the upper part of the disk, after removal of one 



arm. The arms have separated from the cup at the syzygy 



between the first and second brachials, 



