58 SQUIRTS, POLYPS, AND JELLY-FISHES. 
markings are here similar to those seen on Bo- 
tryllus. 
There are anumber of free-swimming or pelagic 
tunicates, some of which approach our coast. One 
of the commonest of these is Salpa spinosa, whose 
BOTRYLLUS. ‘ SEA-PORK’ (Amoraciwm). 
compound chains, measuring as much as a foot in 
length, of perfectly transparent individuals, some- 
times cover the sea over a vast expanse. Another, 
the Pyrosoma, a much rarer form in this region, is 
highly phosphorescent, and lays just claim to being 
considered one of the lamps of the sea. — 
POLYPS. 
The same unsightly sticks of timber that offer 
refuge to the squirts will probably also be found 
to harbor quantities of the delicate feathery tufts 
which are almost everywhere scattered over the 
beach, and which in the popular mind are associ- 
ated in structure with the ‘ sea-weed,’ a term that 
has much to answer for in receiving under its wing 
a multitude of objects that do not belong there. 
These feathery tufts, which are familiar to many 
