PLATE II. 



Detached Stem Joints op various fossil Crinoids. 



Fig. 1 is a joint of Pentacrinus ; fig. 2 of Rhizocrinus. The stem fragment, fig. 3, 

 belongs to Mespilocrinus ; figs. 5, 8, 9, 11, and 12 to Platycrinus ; fig. 6 to 

 Teleiocrinus, and fig. 7 to Cactocrinus. The specimen fig. 10, which probably 

 belongs to an Actinocrinus, shows beautifully the striations at its upper face, 

 and fig. 13 the connection of the cirrus canal with the stem canal. 



4a and b represent the proximal end of the stem of an Onychocrinus, — 45 showing 

 the infrabasals coalesced with the top stem joint (pp. 62, 65). 



17 and 38 represent wide nodal joints to which extremely narrow internodal ones 

 are attached. Figs. 39 to 41 are nodal joints, with or without internodals; 

 figs. 42 to 48 nodals, followed by internodals resting wholly or partly between 

 the projecting margins of the nodals. Traces of new joints occur in figs. 33 

 and 35. The joints in figs. 14 and 20 probably belong to Megistocrinus Evansi ; 

 fig. 21 to Periechocrinus Whitei ; figs. 32, 36, and 39 to Cactocrinus ; fig. 40 to 

 Teleiocrinus ; to the five oval pieces shown by figs. 49 to 53 to Platycrinus. 



