Tank Nr. 4. 



11 



Tank Nr. 4. 



Ascidians (Sea-squirts , p. 84) Cynthia (fig. 28) crimson-scarlet, 

 sausage-shaped ; the mouths of the two tubes can be seen 

 projecting. Phallusia (fig 29) , knobbed white mass. Ciona 

 (fig. 30) , white half-transparent double tubes. Colonies of 

 Diazona (fig. 31). Many other kinds. Tubicolous worms (see 

 Tank 22), a foot high, like feathery palms. 



Fig. 28. Four specimens of 



Cy nth i a p ap illosa , 



J / 2 nat. size. p. 84. 



Fig. 29. 

 Phallusia> mamttlcUa , 



1 o nat. size. p. 85. 



Fig. 30. Four specimens of 



don a infest in a //.v. 



1 o nat. size. p. 84. 



Fig. 31. A colony of 



Diaz ova violacea. 



1 I 3 nat, size. p. 85. 



