MORPHOLOGY OF IXYKRTKMKATK TVPES 



P~ 



d.p._ 



FIG. 9. Morphologic type of a Hexactinia after Y. Delate & E. 

 Herouard, Zoologie Concrete, acn, acontia; b, mouth; d I, j)rimary mesen- 

 tery; d II, secondary mesentety; d III, tertiary mesentery; eld, cinclides; 

 ctd, dorsal (directive) mesentery; dp, foot; dtt, capitulum; culd, mesenteric 

 filament; ,<j/.v, gonad; ilg and Ig, subdivisions of an endocoele; mclc, meso- 

 glcea; o, outer septostoma; <>/, inner septoston^a; p, tentacular pore: />//, 

 gullet; sp/t, sphincter capituli; spgd, dorsal siphonoglyphe; spgi; ventral 

 soj)honogly])he; tt I, IV, tentacles of the first to fourth vertical. 



