PLATE VIIa. 
The Lettering is the same in all the Figures. 
cw. Fibrillay sheath round vascular axis of stem. Js. Interarticular ligament of stem. 
ca’, Its radiating extensions. p. Pigment bodies. 
ch’. Downward prolongation into the stem of the cavities of, 7m’. Muscular foss on the distal face of the first radial. 
the chambered organ. 7s. Radial space in stem. 
id’, Fossa lodging the dorsal ligament. | V. Vascular axis of stem. 
Ui’. Fossa lodging the interarticular ligament. 
Figs. 1-21. Baruycrinus aLpricuianus, Wyv. Thoms. 
Diam. Page 
Fig. 1. Optical section of a piece of stem, cut longitudinally, . ne E66 31 
Fig. 2. Transverse section of stem, central portion, . .) “300 31 
Fig. 3. Upper face of top stem-joint, ; foXt B26 26 
Fig. 4. Upper face of third joint, —. : : > xX. 26 26 
Fig. 5. Upper face of fifth joint, ; pre. 220 27 
Fig. 6. Upper face of ninth joint,  . ; x. 26 27 
Fig. 7. Upper stem-joint, . : : x LG 27 
Figs. 8, 9. Middle stem-joints, : 4 : Sy, SEG Pall 
Figs. 10, 11. Lower stem-joints, : ao toe tals 27 
Figs. 12-14. The basal ring, . : ; : : ee ce 226 
Fig. 12. From above. 
Fig. 13. From the side. 
Fig. 14. From below. 
Fig. 15. Distal face of first radial, re la) 231 
Fie. 16. Distal face of second radial, . . : = ee 8 231 
Fig. 17. Distal aspect of axillary, =. : : , ee Sig ND 231 
Figs. 18, 19. Distal and proximal faces of the fifth brachial, . vey 16 232 
Figs. 20, 21. Proximal and distal faces of an outer brachial, . ots wks 232 
Figs. 22, 23. BaTHYCRINUS CAMPBELLIANUS, 0. Sp. 
Figs, 22, 23. Proximal and distal faces of an outer brachial, . Bee SU) 232 
1 This figure is wrongly lettered 7 on the plate. 
