THE ANTHOZOA 



locally, so that the proximal portions of the zooid cavities are sunk in a 

 coenenchyraa. Family 2. Sykingoporidae. Genus — Syringopora, Gold- 

 fuss. This extinct genus resemhles C'luvidaria viridis ; the cavities of the 

 zooids are divided by cup-shaped transverse partitions called tabulae (Fig. X. 

 7). FA31ILY 3. TuBiPORiDAE. Genus — Tubipora, Linnaeus. The zooids 



'^IfS^: 



Fig. X. 



1. — Diagram of the stnicture of a corallitp of Tulnpora purpurea, showing tlie tabulae in the 

 fonii of axial tubes, hji, horizontal platforms; t, solenia. 



•_'.— A similar diagram, showing conii)Iicat«;cl tabulae. 



3. — View of the inner surface of a corallite of T. purpurea, showing the numerous lacunae, h 

 in the walls of the corallite, and in the region of the node the larger perforations, II, through 

 which solenia jjass into the i)Iatfonn8. 



4.— Diagram showing two tabulae broken across where one tabula (it) runs inside anotlier 

 tabula (if). 



5.— Diagram showing simple, flat, or cup-shaped tabulae. 



G. — Portion of the edge of a growing tabula, showing how the corallum is formed by the 

 union of spicules. 



7. — Portion of a colony of Syringopora ramulnsa, showing the transverse connections between 

 the corallites which correspond to the solenia in the platfonns of Tubipora ; it, a tabula. 

 (After Hickson.) 



are elongate, ranged side by side, and spring from a calcareous encrusting 

 stolon- The proximal part of each zooid is stiffened to form a firm 

 calcareous calyx, the corallite, into which the distal part can be retracted. 

 The cavitj' of each corallite is divided by transverse, calcareous jiartitions 

 of various form — tabulae. The individual zooids are united with one 



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