A CERTAIN CONVOCATION OF POLITIC WORMS 

 AND CORALS. 



Fig. II. — Heteropsammia aphrodes^ from off the Ganjam coast, 20-25 

 fathoms. The left-hand figure shows the base of the coral, with the opening- 

 for the messmate worm ; the right-hand figure gives a view of the interior of 

 the cup of the coral. Both figures, of course, represent merely the skeleton of 

 the coral, from which the animal has been removed by maceration ; twice the 

 natural size. 



[7(3 face page 1 1 2. 



