i 



PLATE XI. 



PAGE 



Figs. 1-3. Tsegeria j)ulchTa, F. E. S., . . . 94 



Fig. 1. Section at right angles through the lateral wall (combination figure); x 40. 

 Fig. 2. Small hexact with spinose rays, from the outer trabecular framework; X 100. 

 Fig. 3. Discohexact from the outer trabecular framework ; x 300. 



Figs. 4-6. WalteriaJiemmingiijF. E. S., . . . 96 



Fig. 4. Section at right angles through a beam of the framework of the lateral 

 wall, with two commensal hydroids (combination figure); x 50. 



Figs, 5, 6. Pentact hypodermalia from the dermal skeleton; x 100. 



