338 MANUAL OF NATUKAL HISTOKY. 



solid axis ; margin with cirrhi or folicaceous appen- 

 dages pendent from the lower surface. 



1. FAMILY. Simple Jelly-fishes (Eudoridse). Sim- 



ple, without true tentacles, peduncles, or arms. 



2. FAMILY. Tentacular Jelly-fishes (^Equoreidse). 



Circumference of body, and sometimes the 

 mouth, surrounded by tentacles. 



3. FAMILY. Pedunculate Jelly-fishes (Oceaniid). 



Gastric cavity prolonged into a sharp pedun- 

 cle, at the end of which is the mouth, sur- 

 rounded by four brachial appendages. 

 4 FAMILY. Proboscis Jelly-fishes (Geryoniidse). 

 Lower and central part of body prolonged into 

 a proboscis-like appendage, either simple, or 

 provided with arms. 



5. FAMILY. Jelly-fishes proper (Medusidse). With 



a central mouth ; lower surface furnished with 

 more or less numerous ramified brachial ap- 

 pendages. 



6. FAMILY. Root-mouthed Jelly-fishes (Khizostoma- 



tidse). Without an open mouth in the centre ; 

 nourished by suction through the tentacular 

 ends of their ramified peduncle. 



Til. OKDEB. CIRKIGRADE SEA-NETTLES 

 (Cirrigradae). 



Body oval or circular, gelatinous, supported by an 

 internal, sub-cartilaginous body, and with extensile, 

 tentacular cirrhi pendent from the whole of the under 

 surface. 

 1. FAMILY. Velellas (Velellidse). Body discoid or 



