34 SEA-SHORE LIFE 
The Milky Disk, (Aurelia flavidula, Fig. 9), is common north 
of Cape Cod to the Arctic Ocean, but is not very abundant along 
our coast. The disk is about one foot in diameter, is flatter than 
a hemisphere and is slightly milky in color, while the four horse- 
shoe-shaped reproductive organs near the centre are yellowish-white 
or pink. The mouth is at the centre of the concave side of the 
disk and is surrounded by four long frilled lips. Sixteen straight 
and sixteen pitchfork-shaped vessels extend outward from the 
central stomach to the 
edge of the disk. The 
little pear-shaped lar- 
ve are cast out in im- 
mense numbers, and 
after swimming about 
for a few days, they set- 
tle upon the bottom 
and develop a ring of 
tentacles in a zone 
around the mouth. 
Finally the body of the 
larva splits up into a 
series of disks, each 
one of which swims off 
and develops into a 
full-grown jellyfish. 
The Speckled Jel- 
lyfish, (Dactylometra 
qunquecirra, Fig. 10), 
is found in a few local- 
ities, as at Tiverton, 
Rhode Island, in great 

abundance, during the 
latter half of the sum 
mer, and it occurs in 
the upper reaches of 
Fig. 10; SPECKLED JELLYFISH. 
many other bays and estuaries from Florida to Cape Cod. 
The disk becomes about one and one-half feet in diameter, 
and its margin bears thirty-two notches and, when fully grown, 
