146 



THE VOYAGE OF H.M.S. CHALLENGER. 



F. FlLAMENTA. 



/ Filamenta gastrulia, 



Digituli gastrales, 

 Tentacula gastralia. 



Gastral-filaments. 



Digitate bodies, 

 Digitate appendages, 

 Gastral tentacles. 



Gastralfilamente. 



Magenfaden, 

 Magen-Tentakeln, 

 Genital- Tentakeln. 



Finger-shaped processes of the gastral wall, projecting freely into the hollow space of 

 the gastrovascular system, and consisting of solid threads (or tufts of the gelatinous 

 matter of the disk) whose free upper surface is covered by an endodermal epithelium ; 

 this is differentiated into flagellate cells, thread cells, glandular cells, and epithelial muscu- 

 lar cells. 



fa Filamenta gastris oralis. 



fb Filamenta gastris basalis. 



fe Crura tjeniolorum. 



fg Filamenta gastris centralis. 



fp Filamentornm phacelli. 



ft Taeniola gastralia. 



Tentacles of the buccal stomach. 

 Tentacles of the basal stomach. 

 Branches of the gastral ridges. 

 Tentacles of the central stomach. 

 Bunches of filaments. 

 Ridges of the stomach. 



Orale-Magenfaden. 

 Basale Magenfaden. 

 Schenkel der Magenleisten. 

 Centrale Magenfaden. 

 Filament-Biindel. 

 Magenleisten (interradial). 



G. Gaster. 



Stomachus, 



Cavitas centralis. 



Stomach. 



Central cavity, 

 Main cavity. 



Magen. 



Centralhblde, 

 Haupthbhle. 



The central principal cavity of the body, sometimes discoid, sometimes bell-shaped, 

 whose central vertical axis also forms the principal axis of the Medusa body. The upper 

 (dorsal or urabral) wall of the gastral cavity is alwaj^s formed by the solid gelatinous 

 mass of the umbrella (covered by the flat epithelium of the dorsal endoderm), while 

 the lower (ventral or subumbral) wall is formed by the central part of the subunibrella 

 (covered by the high epithelium of the subumbral endoderm) ; the manubrium opens in 

 the centre of the lower wall. 



ga Gaster oralis. 



gb Gaster basalis. 



gc Gaster centralis. 



gd Glandulie gastrales. 



gf Fundus gastris. 



</;/ Membrana gastro-genitalis. 



gh Crux gastro-genitalis. 



gk Gastris nodi palatini (perr.) 



gl Lamina gastralis. 



gm Gastris margo periphericus. 



gn Antra gastris basalis (perr.) 



go Ostia gastralia (perrad.) 



gp Gastris porta palatina 



Oral stomach. 

 Basal stomach. 

 Central stomach. 

 Glands of the stomach. 

 Bottom of the stomach. 

 Gastrogenital membrane. 

 Cross of the same membrane. 

 Nodes of the palate. 

 Endoderm-lamella. 

 Periphery of the stomach. 

 Niches of the basal stomach. 

 Openings of the stomach. 

 Palatine door. 



Scliliuidmagen. 



Grund magen. 



Mittelmagen. 



Magendriisen. 



Magen-Boden, Magengnind. 



Gastrogenital-Mem bran. 



Leistenkreuz dieser Membran. 



Gaumenknoten. 



Magen-Gefiissblatt. 



Magen-Urnkreis. 



Nischen des Gnmdniagens. 



Gastral-Ostien. 



Gaumenpforte. 



