122 ‘LASS Il. 
Orper Il. Discophore. 
Body disciform or campanulate, above naked, below usually 
provided with arms or tentacles. 
The Medusoids or Sea-blubber. They have a gelatinous disc, on 
the upper surface more or less spherical, which from its form has 
been compared to an umbrella or a hood; the form has some re- 
semblance to toad-stools (agarici). These animals move themselves 
by expansion and contraction of the hood. The mouth, or the suc- 
torial organs which take the place of the mouth, are situated in the 
center of the inferior surface, sometimes elongated into a pedicle 
and provided with different tentacles. On this difference are 
founded the numerous genera which modern writers have felt jus- 
tified in adopting. 
Compare on this order: Pron et Lesuzur, Tableau des carac- 
teres génériques et spécifiques de toutes les espéeces de Méduses con- 
nues jusgwa ce jour. Annal. du Muséum xiv. 1809, pp. 325—366. 
J. F. Branpt, Ausfiihrliche Beschreibung der von C. H. MERTENS 
auf seiner Weltumsegelung beobachteten Schirmquallen ; mit 34 meist 
colorirten Tafeln. St Petersburg, 1838, 4to (from the Mém. de 
C Acad. des Sc. de St. Petersburg, vi’. Série, Tom. Iv.) 
A) Many oscules. 
Family VI. Geryonide. A peduncle from the center of the 
inferior surface of the disciform body, with the free extremity 
lobate, or furnished with arms. The border of the body mostly 
tentaculate. (Genus Dianea LAM.) 
It is not so completely established that all the forms here brought 
together are really characterised by the absence of a simple mouth. 
Witt at least, in the animals placed by him in the genus Geryonia, 
found a mouth surrounded by four lobes. In some the pedicle is 
supplied at its extremity with a folded appendage (Geryonia), in 
others at its base, or at its extremity, it is beset with threads: 
Favonia, Lymnorea, &e. 
Genera: Geryonia P&éron, Proboscidactyla Branpt, Dianea, 
Linuche Escuscu., Saphenia Escuscu., Lirene Escuscu., Limnorea 
Préron, Lavonia PERN. 
