Natural Science, vol. vii. 



[Plate VIII. 



Crinoidea. 

 Fig. I. Bathycrinus camphellianus, P.H.C.; mid-Atlantic, 1,850 fms. ; x 3. 

 Fig. 2. Hyocrinus bethellianus, Thorns. ; Southern Ocean, 1,600 fms.; x 2. 

 Fig. 3. Promachocrinus kergi'.elensis, P.H.C.; centrodorsal and radials. 

 Fig. 4. Thaumatocrinus rettovatiis, P.H.C. ; from anal side ; arms and 

 cirri broken off. 



