PLATE XXXI. 



Pavonaria quadrangularis, p. 164. 



FIG. 



1 . A view of the entire animal considerably reduced. 



2, 3, 4. Portions of the animal of the natural size. 



5. A magnified view of a separate polype when in a state of 



full expansion, see p. 165. 



6. A side-view of the same, magnified to the same degree. 



7. A portion of a tentaculnm. much magnified, to show the 



structure. 



^ 

 '%* These figures are from the drawings of Professor Edward Forbes. 



