158 CAMPANULARIIDyE. 



THIS species seems to have passed, like 0. lonyissima, as a 

 variety of 0. dichotoma ; it is of much larger size, rising 

 to a height of 8 or 10 inches, or perhaps more. The ra- 

 mification is perfectly regular, the branches short, spring- 

 ing alternately from the stem, and forking immediately 

 above the base into two principal shoots, each of which is 

 divided and subdivided dichotomously. The arms of the 

 fork tending in opposite directions give the branch its 

 somewhat flabellate form, and to the whole zoophyte its 

 verticillate appearance. 



The decidedly flexuous character of both stems and 

 branches offers another point of contrast with 0. dicho- 

 toma. The calycles, too, are formed on another pattern, 

 being shorter and subtriangular. 



If I am right in identifying this species with the C. 

 dichotoma of Dalyell (and his description and figure agree 

 better with it than with 0. longissima, the only other 

 allied species), the gonozooid has about 23 (probably 24) 

 tentacles, forming a " pendent marginal fringe." He 

 gives it the name of Tintinnabulum, from its resemblance to 

 a hand-bell. 



O. flabellata is separated from the preceding species by 

 a group of distinctive characters the subverticillate habit, 

 the flabelliform branches, the flexuous stems, the short 

 subtriangular calycle, and the much larger size. 



Hab. Tenby, on rocks in tide-pools (J. A.) : Scotland 

 (Sir J. Dalyell). 



