THE ANTHOZOA 



between individual corallites, and is distinguished as coenenchyme. 

 The individual corallites may be wholly immersed in coenenchyme. 

 in which case the whole of the soft tissues connecting the zooids 

 have the character of coenosarc ; or, as in Galaxea, Fig. XXXIII. 

 5, the corallites may be only partially immersed in coenenchyme, 

 in which case the soft tissues on the outside of the projecting 



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Flo. XXXI. 



1. Diagrammatic transverse section through two quarters of a zooid of Amphihelia ramea. 

 A, through the theca in the region of the tentacles, showing the peripheral ends of the mesen- 

 teries in the cavity of the perisarc. B, below the stomodaeum, snowing the external canals 

 between the body wall and corallum. Ectoderm blocked black and white, corallum shaded. 

 (After G. H. Fowler.) 



2. Vertical section through a corallite of Euphyllia, showing the dissepiments, DS. 

 (Original.) 



3. Diagrammatic representation of the relations of septa, SS ; mesenteries, MM ; costae, 

 CC ; and body wall, P, in Stephanophyllia formosissima, in a small cube cut out of the base of 

 the zooid ; RT, radial trabeculae ; SN, synapticula. Ectoderm blocked black and white ; 

 corallum dotted. (After Fowler.) 



4. Part of a section through a corallite of Euphyllia, showing the formation of the theca, 

 Th, from the peripheral ends of the septa ; SS, dissepiments. (Original.) 



distal moieties of the corallites have the characters of edge-zone, 

 whilst the spaces between the corallites are covered with coenosarc, 

 the latter shading imperceptibly into the former. For a full 

 description of these relations the reader is referred to Fowler's 

 Memoirs (22-26). 



Budding takes place in an analogous manner in perforate corals, 

 but the relations between edge-zone and coelenteron, referred to 



