EXPLANATION OP PLATE XI. 



Fig. 3. Lobophytum, tuberculosum, Q. & G. 



a, b, c. Spicules from the ccenenchyma. 



j. d, e, f. Spicules from the cortex. 

 Fig. 4. Lobophytum densum, sp nov. 



a. Colony. Nat. size. 



b. Portion of colony. Nat. size. 



c.d,e,f. Spicules from the ccenenchyma. 



g, h. Spicules from the cortex. 

 Fig. 5. Lobophytum confertum, Dana. 



a, 6, c. Spicules from the coenenchyma. 



d, e. Spicules from the cortex. 



