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66 SQUIRTS, POLYPS, AND JELLY-FISHES. 
shore lifeless and tentacleless, deformed and decay- 
ing, it cannot but present a more or less repulsive 
appearance, and it is little wonder that, from what 
is generally their first experience, most people want 
to have little to do with jelly-fishes. In the case 
of the Cyanea this aversion has much in its favor, 
since the animal is a powerful stinger, and can in- 
flict injury that few would like to have repeated. 
The Cyanea arctica, which is the largest form of 
jelly-fish known, is one of the commonest of the 
Atlantic coast species, and some of its ill-shaped 
pads can at almost all times be found upon the 
shore. About equally common is the ‘sun-jelly,’ 
or Aurelia (Pl. 4, Fig. 1), whose disk, however, 
rarely measures more than fifteen inches across. 
Both species are the product of tiny attached hy- 
droids measuring less than an inch in length. 
Among the rarer species of jelly-fish occurring 
on the New Jersey coast is the Portuguese-Man- 
of-War (Physalia), which is wafted thither from 
the southern waters on the current of the Gulf 
Stream. In this species of remarkable form and 
exquisite coloring we have a compound colony of 
free-swimming hydroids and attached meduse, all 
united, as it were, under a single roof—the large 
swimming bell or float. Equally rare are the 
closely-related Velella (Pl. 4, Fig. 9) and Porpita, 
although the disks of the latter, particularly in the 
southern parts of the State, have been thrown up 
by hundreds as the result of a single storm. A 
small round jelly-fish, of much the size and appear- 
