KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 25. N:0 2. 193 



Plate VII. 



Cyathocrinus (p- 126). 



C. visby censis (p. 130). 



Fig. 199. Dorsal cup, (a) from ant. radius, (b) from post. interradius, (c) from below. (p. 132.) 

 Fig. 200. Same specimen; articular facet of radial. This specimen does not show traces of connection 



betwcen ventral groove and axial canal. (p. 131.) 

 Fig. 201. Ventral surface of anotlier calyx, showing madreporite. (p. 132.) 

 Fig. 202. Var. monilifer; dorsal cup, from post. interradius, with portion enlarged to show ornament. 



The small lump at the junction of the stem and cup is due to some boring parasite. (p. 132.) 

 Fig. 203. Var. monilifer; another specimen, from ant. radius, with portion enlarged to show ornament. 



(p. 132.) 

 Fig. 204. Var. Icevis; dorsal cup, from r. ant. radius. (p. 132.) 



Fig. 205. A ventral sac, most probably belonging to this species; from the side. (p. 132.) 

 Fig. 206. Another ventral sac. from distal cnd. (p. 132.) 



C. acinotubus (p. 133). 



Fig. 207. Specimen o; a radial, showing articular facet. (p. 134.) 



Fig. 208. Same specimen; brachials and covering-plates, from the ventral surface. In the lower part of 

 the drawing the covering-plates are complete and in situ, <•' being the proximal and c 2 the 

 distal portion of each plate. In the middle part of the drawing the covering-plates proper 

 have been dissected away, exposing the small round inner pieces 1, of which 3 are seen in 

 place. There is also exposed in this region an infilling of calcite, the crystals of which have 

 the appearance of a series of interna! alternating plates. The surface form of this infilling is 

 merely an impression of the inner side of the covering-plates and inner pieces, as may be 

 seen by eomparison with Fig. 212. In the upper part of the drawing all covering-plates 

 as well as the infilling are removed so that the bottom of the groove, the articular facets for 

 tbe covering-plates and the notches for branches of the axial nerve-cord, are all clearly seen. 

 It is also shown that the elements of the calcite intilling are in crystalline continuity with c 1 , 

 to such an extent that impressions occur at the bottom of the groove which correspond to 

 the covering-plates above (p. 134). 



Fig. 209. Same specimen; three brachials, with covering-plates partly removed, seen obliquely from tbe 

 side. Lettering as in Fig. 208. (p. 134.) 



Fig. 210. Same specimen; brachials and covering-plates from the side. Lettering as in Fig. 208. 



Fig. 211. Same specimen; covering-plates removed from brachials and dissected along the admedian 

 suture-lines. The sjicctator sees the e's of the side opposite to him, alternating with which 

 are the c 2 s of the side nearest to him. It is seen that these latter do not reach down to 

 the ventral groove. The relation of tbe inner pieces i is also clearly shown. (pp. 134, 135.) 



Fig. 212. Same specimen; covering-plates removed from brachials and seen from underneath. Lettering 

 as in Fig. 208. (pp. 134, 135.) 



Fig. 213. Same specimen; the articular surface of a brachial, with covering-plates in position. Lettering 

 as in Fig. 208, except that the elements of the opposite sides are distinguished by r and /. 

 (p. 134.) 



Fig. 214. Same specimen; some plates of the ventral sac. showing irregularities of surface with a slightly 

 radiating disposition and entire absence of pores or slits. (p. 135.) 



Fig. 215. Specimen e, from ant. radius. (p. 134.) 



Fig. 216. Specimen e, ornament. 



Fig. 217. Specimen /; dorsal cup from below, with a columnal attached. (p. 134.) 



C striolatus (p. 136). 



Fig. 218. Specimen b; dorsal cup, with fragment of stem. from ant. radius. 



Fig. 219. Same specimen; stem-facet. (p. 137.) 



Fig. 220. Specimen c; cup from anal side. (p. 137.) 



Fig. 221. Specimen a; cup from below. 



