26 



ZOOLOGY. 



others swim away in the Epliyra form (Fig- 26), when 

 about a fifth of an inch iii diameter, and toward tlie mid- 

 die or end of summer become adult Aurelice (Fig. 27). 



Fig. 24.— Scyphistoma of Au- Fig. a.").— Strobila of Au- Fig. 26.— Ephyra or ear- 

 relia. relia flavidula. Mag- liest free condition of 



niliea. Aurelia. Magnified. 



An example of the compound Hydroids, called Sipliono- 

 phnra, is the Pliysalia, or Portuguese man-of-war (Fig. 28), 

 which is common in the tropics, and is sometimes carried 



Fig. ^1 .— Aurelia flavidula. Natural size. 



northward by tlie Gulf Stream. It is excessively poisonous 

 to the touch. In picking up specimens stranded ou the 



