SEA-NETTLES. 107 
found by EHRENBERG in the Red Sea, and he could not discover 
any difference between it and that found in the northern and the 
Baltic seas. Oftentimes many species of Medusz are collected in 
such quantities at certain places, that they form as it were banks 
in the sea, which it requires days to sail through’. In fine calm 
weather Meduse come to the surface: during storms they seek the 
quieter waters of the depths. 
1 PERON ef LESUEUR Annales du Mus. X1v. p. 222; such a bank of Medusa aurita 
in the Baltic at the mouth of the Weichsel was also described by V. SreBoLD, Beitr. z. 
Naturgesch. der wirbellosen Thiere, s. 5. 
