MANUAL OF ZOOLOGY 



Fig. 6t. — 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.fil, basal piate; col, columella; c. t/i, epitheca; gul, 

 gullet; mes. y vies, i, vtes. 2, mesenteries; mes. f, mesenteric filaments; sep, 

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

 Bourne.) 



