PLATE XIV. 



LETTERING ON THE FIGURES. 



eol. II'., column wall. 



e. is., cell-islet. 



e. s ciliated streak (Flimmerstreif ) . 



eu., cuticle. 



d., directives. 



disc, disc. 



eet., ectoderm. 



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



eet. in., .... ectodermal muscle layer. 



enc. s encircling sinus. 



end., endoderm. 



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



fi. I., fibrillar layer. 



fos., fossa. 



ffl. c gland cell. 



g. gr gonidial groove. 



g. s., glandular streak. 



(Driisenstreif, Nesseldriisenstreif ) . 



inc., incrustations. 



i. «., intermediate streak. 



lac lacunae. 



in.fil., mesenterial filament. 



mes., mesogloea. 



mg. St., .... marginal stoma. 



inr. m macrocnemio mesentery. 



nem., nematocyst. 



nr. I., nerve layer. 



oh. m., oblique muscle. 



p. b. m., .... parieto-basilar muscle. 



per. St., .... perioral stoma. 



r. ect., reflected ectoderm. 



)■. m., retractor muscle. 



)•. s., reticular streak. 



s. d., sulcar dii'ectives. 



si. d., sulcular directives. 



sp., spermarium. 



sph. m sphincter muscle. 



St stomodaum. 



tent., tentacle. 



zoox., zooxantbeUse. 



I., II., III., &c., . . orders of mesenteries or tentacles. 



Figure 



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



2. H omostichanthus 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 separntnu. Radial section through one-half of a retracted polyp. The section 



passes through a mesenteric chamber, x 75. 



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