PLATE XXXa. 



Pentacrinus naresianus, n. sp. 



Fig. 1. The youngest specimeu obtained. 



Fig. 2. One of its internodal joints, .... 



Fig. .J. One of its nodal joints ; upper face, 



Figs. 4, 5. Two fragments, probably from the lower part of the stem 

 of this specimen, ..... 



Fig. G. Portion of a full grown stem, .... 



Fig. 7. One of its internodal joint.s, .... 



Fig. 8. The inner face of an arm from the third to the eighth brachials 



Figs. 9, 10. Two syzygial joints from the arm of a young iudiv^idual 

 as seen from the side (fig. 9) and from above (fig. 10), 

 a. The epizygal. 

 h. The hypozygal. 



i^igs. 11, 12. Similar views of a full grown syzygial pair. 



10 



32^ 



