PLATE XIV. 



LETTERING ON THE FIGURES. 



col. w column 'wall. 



c. is., cell-islet. 



c. s., ciliated streak (Flimmerstreif). 



cu., cuticle. 



d., directives. 



disc, disc. 



ect., ectoderm. 



ect. can., .... ectodermal canal. 



ect. m., . . . . ectodermal muscle layer. 



enc. s encircling sinus. 



end., endoderm. 



end. m., .... endodermal muscle layer. 



fl>. I., fibrillar layer. 



fos., fossa. 



gl. c, gland cell. 



g. gr gonidial groove. 



g. s., glandular streak. 



(Driisenstreif, Nesseldriisenstreif) . 



inc incrustations. 



i. s., intermediate streak. 



lac, lacuna?. 



m mesentery. 



m.fil., mesenterial filament. 



mes., mesoglosa. 



mg. st., .... marginal stoma. 



mr. m.., . . . . macrocnemic mesentery. 



nem., nematocyst. 



nr. I., nerve layer. 



ob. »!., oblique muscle. 



p. b. m parieto-basilar muscle. 



per. st., .... perioral stoma. 



r. ect., reflected ectoderm. 



r. m., retractor muscle. 



r. s., reticular streak. 



s. d., sulcar directives. 



si. d., sulcular directives. 



sp., spermarium. 



sph. m., . . . . sphincter muscle. 



St., stomodaeum. 



tent., tentacle. 



200.1;., zoosanthellae. 



1., 11., in., &c, . . orders of mesenteries or tentacles. 



Figure 



1. Stoichactis helianthus. Eadial section through the fossa and across the sphincter muscle, x 50. 



2. Homostichanthus anemone. Transverse section through the stomodaeal wall enclosing a gonidial 



groove, x 50. 



3. Actinoporus elegans. Vertical section through the apex of the column and the periphery of the 



disc, x 50. 



4. Parazoanthus separatum. Radial section through one-half of a retracted polyp. The section 



passes through a mesenteric chamber, x 75. 



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