638 



MEDUS.« OF THE WORLD. 



bell-radius. 4 to 6 flat, short side branches arise from each arm in a tree-like manner and these 

 in turn give offside branchlets. Numerous small and 5 or more large, club-shaped vesicles on 

 each arm between the mouths. The largest 2 to 3 times as long as width of main branches of 

 arms. 4 small subgenita! ostia. 



Color very brilliant and variable. Exumbrella is reddish-brown to violet-brown, with 

 milk-white spots, between which are dark, radial stripes. 13cll-margin usually bluish or violet. 

 The milk-white spots on the exumbrella are disposed as follows: A large oval spot above 

 each sense-organ and a small, white spot upon each lappet. Thus there are 80 (5X 16) small 



