PLATE XVIII. 



1. Basal part of calyx, with upper joints of stem of specimen No. 7 (f). 



■_'. Curved part of the stem immediately below the joints figured above Fig. 1, eight to nine joints 



more or less crushed ('•). 

 3, 4, 5, 6. Joints of i arts of stem of Fig. 2. at points marked a, b, c, d {'[)■ 

 3*. Some of the joints of Fig. 3, showing the angular character of the joints (}). 



4 b . Some of the joints of Fig- 4, after they have passed to flat rings, with only an occasional indis- 

 tinctly ribbed joint (\). 

 5°. Some of the joints of Fig. 5 with closely serrated sutures, and scarcely ribbed, before passing into 



stage of Fig. G d (*). 

 6 4 . Some of the joints of the lower end of the stem of Fig. 6, of a slightly less diameter than those at 



the upper end, with smooth sutures and convex sides (*). 

 7, 8. Probably contiguous parts of the stem of specimen Xo. 7 intermediate between that of Fig. 2 



and that of Fig. 0, with joints of nearly uniform height, having convex sides and smooth 



sutures (j). 

 7". A few joints of Fig. 7 at the point marked a ($). 

 9. A part of the stem, probably of specimen No. 7, following nearly the joints of the stem of 



Fig. 8 (■•). This part of the stem widens very perceptibly towards the lower part, and, 



judging from the basal parts of the stems of several fossil species of Apiocrinus, must have 



been near the root. • 



9*. Magnified joints of lower part of stem of Fig. 9. at point marked a, with smooth sutures and convex 



sides. 



