ae 
ee 
[By J. Sinel. 
SWIMMING SEA SQUIRTS. 
The figure in the lower left-hand corner is the Solitary Salps. Above it is the long chain of another species, a great number 
of individuals being connected. The barrel-shaped form to the right of it is Doliolum, represented life-size for British waters, 
but in tropical seas it is four or five times larger. The bullet-shaped form above it is Pyrosoma, in which again many individuals 
are united to form a hollow cylinder. It is remarkably luminous. In warmer seas it has been found measuring four feet 
in length. 
