246 SOMETHING ABOUT JELLY-FISHES. 
Professors Agassiz and Clark, and Mr. A. Agassiz, have 
detailed very fully the anatomy and classification of our 
native species. 
The Jelly-fishes of our coast are represented by nume- 
rous globular and disk-like animals of a gelatinous tex- 
ture, more or less transparent, having certain appen- 
dages consisting either of longitudinal Bands of vibrating 
fringes, as in one order; or, as in another order, having 
appendages surrounding the mouth, and others, thread- 
like, hanging from d margin of the disk. The parts 
most conspicuous within the body are the ovaries, or egg- 
sacks, the stomach, and certain tubes running from the 
stomach to the periphery of the body. 
These animals are apparently radiated in their struc- 
ture ; at all events, it is difficult in certain groups to dis- 
tinguish a right and left side, and for this reason they are 
called Radiated animals, and form one of the three classes 
of the branch RADIATA. 
The Jelly-fishes of our coast are common in our har- 
bors and inlets, where the water is fresh and pure from 
the ocean. A very ready and convenient way to collect 
them is to moor your boat on the shady side of a wharf 
where the reflected rays of the sun are avoided, and, as 
the tide sweeps gently past, to dip them as they are borne 
along by the current. Some little practice is necessary 
to discern the smaller kinds, for many species are very 
minute, and other species, though of good size, are never- 
theless hard to distinguish on account of their extreme 
transparency. They may be dipped from the water with 
a tin dipper, though a wide-mouthed glass jar is better 
for this purpose. As they are duvi they may be 
poured into a wooden pail for assortment and examination 
at home; or, better, a large glass jar, carried on purpose 
