100 FOSSIL FAUNA. 



PLATE XIj.— continued. 



Figs. 8, & 10. These pebbles have the surface covered with casts of Clionites {CUonites Conyheari, 

 of Mr. Morris.') 



Fig. 9. Fragments of the radicle processes of attachment of some Apiocrinite or Lily-shaped 

 animal in chalk ; see description of Plate LI. 



Fig. 14. A section of a siliceous nodule; probably the cellular appearance is inorganic: fig. 13, 

 is a magnified section of the cells. 



' Mr. Morris thus defines the generic character of these fossil bodies : — " Reticular masses of a more or less compressed 

 globular, elliptical, or polygonal form ; rugose and sometimes papillose ; connected by minute tubnli or fibriUse. Dendritical, 

 dichotomous, or irregularly aggregated." Clionites Conyheari is characterized by " Cells irregular, somewhat polygonal, 

 with one or more papillje; surface finely tuberculated, connecting threads numerous." Note from Mr. Morris, April, 1850. 



The fossils, however, do not appear to be the silicified sponge (Cliona) by which the ravages in the shell have been 

 effected ; they are merely casts of the cavities produced. 



