REPORT ON THE DEEP-SEA MEDUSAE. 



145 



D. Entoderma. 



Entoderma, 

 Lamina gastralis. 



Endoderm. 



Hypoblast, 

 Inner germinal layer. 



Darmblatt. 



Gastralblatt, 

 Inneres Keimblatl. 



Internal primary germinal layer, corresponding to the internal simple germinal layer 

 of the gastrula (or to the evaginated half of the blastula). In the Medusa it divides later 

 into the permanent endoderm (or the epithelium of the gastrovascular system), the 

 gelatinous mass (umbrella), and the supporting plates, &c. 



da Entoderma orale. 



dc Entoderma canalis circularis. 



df Entoderma filamentorum. 



dg Entoderma gastralo. 



dk Entoderma cathammale. 



dl Entoderma loborum. 



dp Entodermatis plicae et processus, 



dr Entoderma canalium radialium. 



ds Entoderma sexuale (Acraspeda- 



rum). 



dt Entoderma tentaculorurn. 



du Entoderma umbrale. 



dw Entoderma subumbrale. 



dz Entodermatis cellulaj chordales, 



Oral endoderm. 



Epithelium of the circular canal. 



Epithelium of the gastral filaments. 



Epithelium of the gastral cavity. 



Endoderm of the lines of fusion. 



Epithelium of the lobe pouches. 



Folds and tufts of the endoderm. 



Epithelium of the radial canals. 



Germinal epithelium of the sexual 

 organs (of the Acraspeda). 



Inner epithelium of the hollow ten- 

 tacles. 



Dorsal epithelium of the canals. 



Ventral epithelium of the canals. 



Notochordal cells of the solid ten- 

 tacles. 



Gastral-Epithel des Mundes. 

 Gastral-Epithel des Ringcanals. 

 Epithel der Gastral-Filamente. 

 Inneres Magen-Epithel. 

 Gefass-Platte. 



Epithel der Lappentaschen. 

 Falten und Zotten des Entoderms. 

 Epithel der Radial-Canale. 

 Keim-Epithel der Geschlechts-Organe 



(der Acraspeden). 

 Gastral-Epithel der hohlen Ten- 



takeln. 

 Epithel der dorsalen Canal-Wand. 

 Epithel der ventralen Canal-Wand. 

 Entodermale Chordal-Zellen (Axe 



der soliden Tentakeln). 



E. EXUMBRELLA. 



Paries umbrellm dorsalis, 

 Ectophragma. 



EXUMBRELLA. AuSSENSCHIRM. 



Dorsal wall, Riickemeand, 



Outer (convex) wall of the umbrella. Aeussere (convexe) Schirmwand. 



External or upper wall of the gelatinous umbrella, covered by a dorsal ectodermal 

 epithelium ; arched more or less convexly, corresponding to the calyx of polyps. It is 

 divided by the umbrella margin from the subumbrella. 



