CAMPANULARIA. POLYPI. 441 



opposite, recurved, subcylindrical ; vesicles ovate. About an inch 

 long. European seas, on fuci. Ellis, Cor. pi. 5, No. 8, tig. a, A. 

 Plate 8,/g. 14. 



2. Cells terminal. 



Gen. 60. CAMPANULARIA, Lam. Sertularia, Lin. 

 Stems fistulous, filiform, horny, simple, or branched ; cells cam- 

 panulate, dentated on the margin, supported by long and 

 twisted footstalks. 



C. verticillata, Lam. Stem alternately branched ; branches and 

 summit verticillate, with terminal cells. Inhabits European seas. 

 Ellis, Cor. pi. 13, No. 20, fig. a, A. 



C. dichotoma, Lin. Stem filiform, long, branched, subdichoto- 

 mous; cells bell-shaped, terminal; vesicles clavate, axillary. 

 European seas. Ellis, Cor. pi. 12, No. 18, fig. a, A, c, C. 



Gen. 61. CORXULARIA, Lam. 



Fixed by the base, horny, with simple infundibuliform stems, 

 each containing a polypus ; polypus solitary, terminal, the 

 mouth with eight tentacular pinnae in one row. 



C. rugosa, Lam. (Tubularia cornucopias, Pall.) Inhabits Medi- 

 terranean sea. Lam. ii. 112. 



Gen. 62. TUBULARIA, Lam. 



Polypiferous mass fixed by its base, slender, tubular, simple or 

 branched, and horny, the extremities of the stem and branch- 

 es terminated each by a polypus ; mouth of the polypi with 

 two rows of naked tentacula, not retractile, and with a varix 

 at their origin. 



The Tulularioe are distinguished from other genera resembling them in general 

 appearance, by their numerous tentacuia disposed in two rows not being capable of 

 retraction into the tube, and by having at their origin a sort of collar. 



T. ramosa, Lam. Tubular, branched, the axillae of the branches 

 twisted. Inhabits British seas. Ellis, Cor. pi. 16, fig. a, pi. 

 17, fig. a, A.. Plate 8, Jig. 15. 



Gen. 63. PLUMATELLA, Lam. 



Fixed by the base, slender, tubular, branching, submembranous, 

 with the extremities of the stems and branches terminated 

 each by a polypus ; mouths retractile, furnished with cilia- 

 ted tentacula disposed in a single row, and destitute of a varix 

 at their origin. 



The polypi of this genus inhabit fresh waters. 



P. cristata, Lam. Stem short, branched, subpalmated ; tentacula 

 in a campanulated or lunated series. Inhabits ponds in Europe. 

 Lam. ii. 107. 



P. repens, Lam. (Tubularia, Gmel.) Stem branching, filiform, 

 creeping ; tentacula subfasciculate, with verticillate ciliae ; vesi- 



