PLATE XXVI. 



PAGE 



Figs. 1-3. Caulophacus elegans, F. E. S., . . 126 



Fig. 1. A musliroom-like somewhat damaged specimen ; natural size. 

 Fig. 2. Discohexaster with short principal rays ; x 100. 

 Fig. 3. A broken stalk ; natural size. 



Figs. 4-9. Trachycaulus gurlittii, F. E. S., . . 128 



Fig. 4. A broken stalk ; natural size. 



Fig. 5. Longitudinal section of the wall of the stalk shown in fig. 4 ; skeleton 

 only; x 100. 



Fig. G. Transverse section of the wall of the stalk shown in fig. 4 ; skeleton only ; 

 X 100. 



Fig. 7. Oxyhexaster with great sickle-like incurved terminal rays ; x 300. 



Fig. 8. Part of an oxyhexact with connected sickle-like incurved terminal rays ; 

 x300. 



Fig. 9. Autodermal hexact pinulus ; x 300. 



