26 
ZOOLOGY. 
others swim away in the Epltyra form (Fig. 26), when 
about a fifth of an inch in diameter, and toward the mid- 
dle or end of summer become adult Aurelice (Fig. 27). 
Fig. 2i.— Scyphistoma of Au- Fig. 25.— Strobila of An- Fig. 26.— Ephyra or ear- 
relia. relia flavidula. Mag- liest free condition of 
nified. Aurelia. Magnified. 
An example of the compound Hydroids, called Sipliono- 
phora, is the Physalia, or Portuguese man-of-war (Fig. 28), 
which is common in the tropics^ and is sometimes carried 
Fig. 27— Aurelia flavidula. Natural size. 
northward by the Gulf Stream. It is excessively poisonous 
to the touch. In picking up specimens stranded on the 
