JELLYFISHES : 139 
is usually solitary, seldom being seen in company with others. It is com- 
mon on the New England coast, and is frequently found stranded on the 
beach, where it in no way suggests the beautiful appearance it pre- 
sents when floating in the water. Like Aurelia, Cyanea has a strobila 
stage. It is supposed that the 
young remain near the bottom, 
for they are seldom seen, while 
adults are plentiful. They begin 
to appear in numbers at the end 
of summer from Cape Cod north- 
ward. 
C. fulva. This species is found 
in midsummer south of Cape Cod 
and is common in Long Island 
Sound. Its general color is light 
yellowish-brown, the flowing cur- 
tains being the darkest part of 
the animal. It is not as large as 
C. arctica, and the lobes of the mar- : oo 
gin are deeper and more rounded. Linvergesimenourtus chiro ple: eh, 
C. versicolor. The whole disk 
is bluish milky-white, the flowing curtains are light brown, and the 
tentacles are pink. It is not so large as C. arctica. Found in the spring 
on the southern coast. 
Genus Linerges 
L. mercurius, the thimble-fish. The English name indicates the 
form as well as the size of this little brownish jellyfish, which is found 
near the Florida Keys, extending in lines for considerable distances. 
Genus Pelagia 
P. cyanella. Umbrella spherical, margin scalloped, tentacles eight 
in number; four long appendages ruffled on the edges hang from the 
mouth; size about two inches in diameter; appendages four inches 
long; color pink. (See next page.) 
SUBORDER RHIZOSTOME 
The Rhizostome, or root-mouth jellyfishes, are very remark- 
able. They have no tentacles, but covering the end of the manu- 
brium and hanging from it like tentacles are oval appendages 
with numerous minute funnel-like apertures, called suctorial 
mouths. As the manner of locomotion of jellyfishes is peculiar 
to themselves, so also is this many-mouthed development unique 
in the animal kingdom. The type of this group, described below, 
is found on the Florida Keys. The different species vary in 
diameter from three to eight inches. 
