344 



COELENTERATA ANTHOZOA 



viridis of the East Indian reefs (Fig. 153). Other fossil forms 

 belonging to the order are Favosites, a very abundant coral of 

 the Upper Silurian rocks, and possibly Columnaria. 



Xi^Oy^JKiS^ 



Fig. 152. — Syringopora, a fossil, 

 showing autothecalous tubes [th), 

 funnel-shaped tabulae {tah), and 

 tubular cross-bars (t). 



Fig, 153. — Glavularia {Hicksonia) viridis, with 

 creeping stolon and transverse connecting 

 tubes. 



The principal families of the Stolonifera are : — 



Fam. 1. CoRNULARiiDAE. — Without spicules; Cormdaria, Lamarck, 



Mediterranean ; Stereosovia, Hickson, Celebes. 

 Fam. 2. Clavulariidae. — Clavidaria, Quoy and Gaimard ; Sarco- 



dictyon, Forbes, British ; Sympodium, Elirb ; Syrincjo'pora, 



Cioklfuss, fossih 

 Fam. 3. Tubiporidae. — Tuhipora, Linnaeus, tropical shallow water. 

 Fam. 4. Favositidae. — Favosites, Lamarck ; Syrinfjolites, Hinde ; 



Stenopora, King. 



Order II. Coenothecalia. 



This order contains the single genus and species Heliopora 

 coerulea among recent corals, but was probably represented by a 

 large number of genera and species in earlier periods. 



