40 THE OCEAN. 
found in Berwick Bay, that its motion is peculiar. 
“Tt generally swims on its back, and instead of 
darting forward through the water, as the other 
species of Cyclops do, it springs with a bound from 
the bottom of the vessel, where it rests when un- 
disturbed, up to the surface of the water. For this 
purpose it curls its body up into the form of a ball, 
and then, suddenly returning to the straight posi- 
tion, springs with a sudden bound from the bottom 
to the surface, falling gradually down again to the 
same place from which it sprung.” It is a remark- 
able character of all these pretty little water-fleas, 
that they have but a single eye, which is generally 
of a bright crimson hue, sparkling like a little ruby, 
and is set in the front of the head. Any of my 
inland readers, who may have no opportunity for 
sea-side researches, may form a very good idea of 
the form and habits of these agile ‘‘ minims of exist- 
ence” by pulling up a handful of the common duck- 
weed from a stagnant pool, and putting a pinch of 
it into a clear glass phial, nearly filled with water: 
‘ numbers of the fresh-water Zntomostraca will be 
almost certain to swim out; and the sight will amply 
repay the trouble of procuring them, especially if 
viewed with a microscope, or even a common magni- 
fying glass. 
Probably the objects which would first arrest the 
observation of one who for the first time visited 
a rocky shore, would be, after the broad element 
itself, the marine plants which in such abundance 
and variety clothe the submerged rock. Ata glance 
we perceive that they are singular productions; the 
