62 



A MISSION TO VITI. 



The Balolo (Palolo viridis, E. Gray). Pig. 1. The entire animal, na- 

 tural size ; 2. Portion of the body slightly magnified ; 3. Magnified figure 

 of the head, with its three frontal tentacula and eyes ; the position of the 

 retracted jaws is shown in the central dark space behind the tentacula ; 

 4. Posterior extremity of the Balolo, dorsal aspect ; figures 3 and 4 copied 

 from Macdonald's paper in ' Linnean Transactions,' xxii. 



