Palaeocrinus striatus Billings 



Fig. I View of oral region from photomicrograph xio. The area 

 was not covered by the gum dammar mounting 

 2 View of the anal area from photomicrograph xio. The 

 area was covered with gum dammar solution and a cover 

 glass. The madreporite and the ambulacrals and adam- 

 bulacrals of the food groove above and to the right of it 

 are all clearly seen 



2']2 



