2 



Orophocrinus Puzos, Minister, sp. 



Page 

 Fig. 14. Interradial view of the calyx, witli the ambulacra preserved. The outermost hydro- 

 spire-slits are visible at their sides. Carboniferous Limestone, Belgium. Coll. 



University of Liege. xG 6 



Fig. 15. A radial sinus, with the side and outer side plates in situ. Portions of the hydro- 

 spire-slits are visible on each side. x 8 90 



Orophocrinus Orbignyanus, de Kon., sp. 



Fig. 16. Summit view, with the ambulacral plates remaining intact in four of the fields, 

 and partially removed so as to expose the hydrospire-slits in the fifth. Carboni- 

 ferous Limestone, Belgium. Coll. University of Liege. x 4 90 



Fig. 17. Radial view of the same specimen, with the ambulacra intact and a hydro- 

 spire-slit visible on each side. Carboniferous Limestone, Belgium. x 4 . . 16 



Fig. 18. A radial sinus, with the ambulacral plates in situ, and two hydrospire-slits 



uucovered on each side. The radial lip is well preserved. x 8 90 



