SCYPHOZOA 



239 



Order 1. — The Stauromedusae are a small group in which the sense 

 organs are wanting. There is usually an aboral stalk for attachment. 



Order 2. — The Lobomedusaj are free swimming medusae with sense 

 organs (tentaculocysts) in the notches between the lobes of the umbrella. 



PiG_ 135.— A small sea fan (Gorgonia) and a group of fmgcr sponges. X i/'j- 



529. Class IV. Anthozoa.— The Anthozoa comprise the sea 

 anemones and corals. In this group the medusa stage is want- 

 ing and the polyps are either solitary and comparatively large 

 or smaller and colonial. They are especially abundant in the 



