TABLE OF CCELEXTERATA 33 



Order 4. CAMPANULARI^ (CALYPTOBLAHTEA). 



With hydrothecse and gonangia. Colonial. Generative in- 

 dividuals, when set free, are Leptomedusse, 

 4 Sections. 7 Families. 



E. The Medusae of this Order. 



Craspedota partly with, partly without otocysts ; ocelli present 

 or absent, gonads on radial canals ; budded from polyps of the 

 Campanularise. 4 Families. 13 Sub-families. 



Order 5. TRACHOMEDUSu-E. 



Hydromedusa? without hydrosome (polyp stage) ; with mar- 

 ginal sense-tentacles in pits or vesicles, with endodemial otoliths. 

 Ocelli usually absent. Gonads radial. Radial canals, 4, 6, or 8, 

 often with centri-petal canals. With thread-cell thickening of 

 ectoderm round the edge of the umbrella. 

 4 Families. 8 Sub-families. 



Order 6. NARCOMEDUS^E. 



Craspedota with free auditory tentacles. Tentacles inserted 

 dorsally on the ex-umbrella, and connected with its edge by 

 peroniums. Radial canals, when piesent, in the form of flat, 

 radial, gastric pouches. 4 Families. 



Order 7. SIPHONOPHORA. 



Free-swimming polymorphic colonies of Hydroniednste, pro- 

 duced by budding from an original, probably medusoid, 

 individual. Gonads in gonophores, which, as a rule, are not 

 set free. 



Arranged by & & (After SEDGWICK). 



