THE ANTHOZOA 



67 



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 cocnosarc ; 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 



FlQ. XXXI. 



1. — Diagrammatic transverse section through two qiiartcra of a zooUl of A mphiheli a ramea. 

 A, through the theca in the region of the tentacles, sliowing the jieriiiheral ends of the mesen- 

 teries in the cavity of the perisarc. Ji, below the stomociaemii, showing the external canals 

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

 (After G. H. Fowler.) 



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

 (Original.) 



3. — Diagrammatic representation of the relations of septa, SS; mesenteries, Af.lf ; costae, 

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

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

 cordllum 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 oT 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 



