PLATE VILi 



The LutteriiiG; is the same in all the Fi'mrt 



m. Fibrillar slieatli romi.l vascular axis of stem. 



ca'. Its railiatiug uxtensions. 



ch'. Downward ]irolonf;ation iuto the stum of the cavities of 



the chambered organ. 

 Id'. Fossa lodging the dorsal ligament. 



W. Fossa lodging the iuterarticular ligament. 



Is. Interarlicular ligament of stem. 



j). Pigment bodies. 



/•»(,'. Muscular fosste on the distal face of the lirst radial. 



rs. Radial space in stem. 



v. Vascular axis o£ stem. 



Figs. 1-21. Bathycpjnus aldiiichianu.s, Wyv. Thorns. 



Fig. 1. Optical section of a piece of stem, cut longitudinally, 



Fig. 2. Transverse section of stem, central portion, 



Fig. 3. Upper face of top stem-joint, 



Fig. 4. Upper face of tHird joint. 



Fig. 5. Upper face of fifth joint, 



Fig. 6. Upper face of ninth joint, 



Fig. 7. Upper stem-joint. 



Figs. 8, 9. Middle stem-joints, 



Figs. 10, 11. Lower stem-joints, 



Figs. 12-14. Tlie basal ring, . 



Fig. 12. From above. 

 Fig. 13. From the side. 

 Fia;. 14. From below. 



Kg. 15. Distal face of first radial. 



Fig. 16. Distal face of second radial, . 



Fig. 17.' Distal aspect of axillary. 



Figs. 18, 19. Distal and proximal faces of the fifth brachial, 



Figs. 20, 21. Proximal and distal faces of an outer brachial, 



Figs. 22, 23. Bathycrinus campbellianus, n. sp. 

 Figs. 22, 23. Proximal and distal faces of an outer brachial, . 



1 This figvu-e is wrongly lettered 7 ou the ^date. 



30 



232 



