EXPLANATION OF PLATE XI. 

 EitplecMhi mjieva. F. E. Sch. 



Fig. 1. Lower end of a larger specimen. Nat. size. 



Fig. 2. Younger specimen the upper part of which is missing. Nat. 

 size. 



Fig. :3. The same specimen seen from within. Nat size. 



Fig. Jj. Arrangement of the spicules in a transverse section of the body- 

 wall, vertical to the surface. X ."jO (combined figure). 



Fig. .5. Central part of a principal hexactine with some comitalia on the 



distal ray. x 130. 



Fig. <3. Comital diactine. x 300. 



Fig. 7. Principal hexactine with quite intact radial rays. x 30. 



Fig. 8. Parenchymal oxyliexaster. x 300. 



Fig. 9. Fully developed tioricom. x 300. 



Fig. 10. Young, not fully developed floricom. x 300. 



