14 i CAMPANULARIID.E. 



ringed at the base and at the top, the intermediate por- 

 tion generally smooth ; HYDROTHECJE deeply campanulate, 

 and rather large, expanding slightly above, with 10-12 

 strong triangular teeth round the rim ; GONOTHEC^E borne 

 on the creeping stolon, and occasionally on the stem, 

 ovate, strongly ringed transversely the segments more 

 or less carinated truncate at the top and shortly pe- 

 dunculate. 



GONOZOOID. UMBRELLA (at the time of liberation) globose, 

 perfectly transparent, with numerous thread-cells im- 

 bedded in its substance, and a very wide velum ; MANU- 

 BRIUM short, somewhat swollen towards the base, with 

 a 4-lipped mouth ; MARGINAL TENTACLES very extensile, 

 muricated, halfway between each pair a small tubercle 

 (rudimentary tentacle) with a lithocyst on each side 

 of it. 



C. JOHNSTONI is one of the commonest of our British Cam- 

 panulariidse. The calycles are generally large and the 

 pedicels of great length : but there is considerable varia- 

 tion in these points ; on the same specimen the calycles 

 are often of the most various sizes. The denticulation of 

 the margin is strongly marked. The stems for the most 

 part have the middle portion smooth ; but there is some- 

 times a little ringing even here, and I have met with a 

 variety (which I do not venture to separate from C, John- 

 stoni) in which they are closely ringed throughout. The 

 capsule is more or less produced, and the rings upon it 

 are much more clearly denned in some specimens than in 

 others. 



The polypite is large and handsome, with between 20 

 and 30 long, muricated tentacles. 



C. Johnstoni is occasionally branched, and bears the 

 capsules on the stem. I have not seen more than one or 

 two branches in any case (exact copies of the original 

 shoot), on which a small and imperfectly formed capsule 



