MANUAL OF ZOOLOGY 



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Fig. 6i. — A, B, two views of Flabellum curvatum. Natural size. C, semi-dia- 

 grammatic view of a simple coral; D, portion of a corallite; E, F, diagram of a 

 simple coral in longitudinal and transverse section; ectoderm dotted, endoderm 

 striated, skeleton black, b-ftl, basal plate; col, columella; e. th , epitheca; gul, 

 gullet; pnes., mes. i, mes. 2, mesenteries; vies, f, mesenteric filaments; seP, 

 septa; t, tentacle; th, theca. (A and B after Moseley; C and D after Gilbert 

 Bourne.) 



