PLATE LXII. 



PAGE 



Figs. 1-4. Crateromorpha thierfelderi, F. E. S., . 164 



Fig. 1. A specimen, preserved in alcohol, somewhat damaged at the inferior pai't 

 of the stalk ; natural size. 



Fig. 2. Oxyhexaster with short, principal, and long, S-shaped, bent terminal rays ; 

 x300. 



Fig. 3. Small discohexaster ; x 250. 



Fig. 4. Strong, somewhat bent diact, witliout any traces of the four aborted rays; 

 x50. 



Figs. 5-8. Undetermined Crateromorphid, . . 42 



Fig. 5. Longitudinal axial section of the whole specimen, showing very well the 

 simple unfolded layer of chambers in the earlier state of development 

 (combination figure); x 20. 



Fio-. 6. Large graphiohexaster mth long, straight, sharply pointed terminal rays ; 

 x300. 



Fio-. 7. Blind terminal fundus of a chamber, inner view, showing the membrana 

 reticularis and some pores of the chamber wall ; x 400. 



Fif. 8. Part of the chamber wall, outer view, showing the anastomosing cells of 

 the membrana reticularis, one pore (p) and some of the cells lying 

 upon the chamber wall; x 1000. 



