KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 25. N:0 2. 191 



Plate VI. 



Botryocrinus (continued). 



B. ramosiSSimus (continued). 



Fig. 170. Four brachials from the back. 



Fig. 171. The same; ventral surface, showing covering-plates. (p. 118.) 



Fig. 172. Same specimen; proximal articular surface of an axillary, showing axial canal, ventral groove 



and covering-plates. The cp. consist of two large sidepieces, one of which is marked a (Figs. 



171, 172), of two smaller ad-median plates, and of a median row of minute pieces. The 



regular arrangement of these plates is of course disturbed by the branching of the arms. 



(p. 118.) 

 Fig. 173. Same specimen; distal articular surface of an axillary. showing same struetures as Fig. 172, 



but mostly duplicated. The facet marked b supported one of the large side-pieces. (p. 118.) 

 Fig. 174. Specimen /; an abnormal stem. (p. 120.) 

 Fig. 175. Same specimen; a portion of the stem from the proximal region, indicated by <i in Fig. 174. 



showing the irregularitv of the ossicles and tendency to arrange themselves in horizontal lines. 



(p. 120.) 

 Fig. 176. Same specimen; a portion of the stem half-way down, indicated by b in Fig. 174, showing 



irregularitv of ossicles more pronounced than in Fig. 175, and pits probably made by 



some boring parasite. (p. 120.) 

 Fig. 177. Same specimen; a portion of tlie stem nearer the distal end, indicated by c in Fig. 174, 



showing extreme irregularity of ossicles, though unatfected by boring parasites. (p. 120.) 

 Fig. 178. Same specimen; distal end of stem in section, showing concentric deposition of stereom as is 



so common in Apiocrinus. (p. 120.) 

 Fig. 179. Specimen h; dorsal cup from the side, showing articular facet of radial. (p. 118.) 



B. cucurbitaceus (p. 120). 



Fig. 180. Specimen a, drawn as in ANGELIN, Tab. IV, fig. 9. (p. 121.) 



Fig. 181. Same specimen; articular surface of distal columnal preserved, showing pentagonal axial caual 



and striae. (p. 122). 

 Fig. 182. Specimen b; ventral sac from left side. (p. 121.) 

 Fig. 183. Same specimen; ventral sac from anterior, showing anal opening, which appears to have shifted 



its position, the former position being indicated by a rounded hillock of small plates just 



below the present opening. (pp. 121, 122.) 

 Fig. 184. Same specimen; two brachials, seen from the side. The distalmost is seen to support an 



armlet hy a facet at its upper corner, left hand in the drawing; covering-plates are seen in 



its ventral groove; and, by the fracture of its dorsal surface, the groove itself is laid hare 



from that side. The proximal of the two brachials has a facet which similarly hore an 



armlet, and which is pierced by the axial canal. (p. 121.) 

 Fig. 185. The same, from the ventral surface, showing covering-plates above and ventral groove below, 



with the facets for the armlets on either side. (p. 121.) 

 Fig. 186. Same specimen; brachials (a) seen from ventral surface, showing covering-plates with small 



spinous processes, (b) restored section, showing axial canal and covering-plates in situ. 



(p. 121.) 

 Fig. 187. Specimen </; from 1. ant. radius, so as to show inner side of ventral sac. Armlets are seen 



given off from the main arms on both the left and right sides of the drawing. (p. 121.) 

 Fig. 188. Same specimen; dorsal cup, from anal side. Compare with Fig. 164. (p. 121.) 

 Fig. 189. Same specimen; the lower portion of the coiled part of the ventral sac, showing the deep 



folds of the plates, producing the appearance of fissures. (p. 121.) 



