CALYCOPHORIDA. 127 
has been met with at Porta della Praya and at San Yago, one of the 
Cape de Verde islands. 
The colony of Praya diphyes presents two great locomotive bell- 
shaped masses, between which the common stem is suspended. 
This cylindrical stem, which is thin and transparent, carries on it at 
Fig. 42.—Praya diphyes (Blainville), 
intervals, certain groups very exactly circumscribed and individualised. 
Each of these groups consists of a nursing polyp, having its fishing- 
line with a special floating air bladder, a reproductive bud male or 
female, and a protecting bract enveloping the whole. 
