of British Hydroid Zoophytes. 361 



Campanularia gracillima, n. sp. PI. XIV. figs. 5^ 6. 



Stem erect, compound, subunilaterally branched ; cells very 

 slender, long, tubular, thin, set on loosely twisted pedicles of 

 about two whorls : aperture entire. 



Height 1 inch. 



On shells and zoophytes from deep water, Northumberland 

 coast : occasionally. 



This is a critical species, greatly resembling C. dumosa, from 

 which it can only be distinguished by comparative characters, 

 though its general appearance and habit at once strike the eye 

 as something distinct. It is much smaller than C. dumosa, 

 thinner in texture and more flexuose when fresh, with narrower 

 cells, set on longer pedicles. The stem is erect, and generally 

 compounded of two or three tubes, diminishing to one at the 

 ends of the branches. It is a good deal branched, the branches 

 often rising more from one side of the stem than the other. 

 The cells are long, very slender, thin and transparent, with a 

 smooth rim ; they are set on pedicles, about one-fourth the 

 length of the cells, loosely twisted and making about two turns ; 

 they generally rise at a less angle from the stem than in 

 C dumosa^ and are more fragile, being very apt to fall off when 

 dry. The cells of C dumosa, on the contrary, are more persistent 

 than in any other species of the genus. C. gracillima appears 

 usually to assume the erect form ; only in one instance have I 

 observed it creeping over the surface of a shell near the base of 

 the ascending stem. 



A Campanularia from Bass's Straits, of which Mr. Busk has 

 sent me a drawing, is very similar to this, if not identical. 



Genus Grammaria, Stimpson. 



" Polypidom rectilinear, elongated, cylindrical, composed of 

 aggregated tubes, generally without branches, which, when they 

 occur, are of the same character as that from which they spring. 

 Cells arranged on all sides in more or less regular and equi- 

 distant longitudinal rows, giving the section of the stem a star- 

 like appearance." — Stimpson^, 



G. ramosa, n. sp. PI. XIV. figs. 1-4. 



Polypary stout, horn- coloured, irregularly branched, the 

 branches rising from a constricted base : cells cylindrical, 

 bending outwards to a distance nearly equalling the width oiF 

 the stem, with an even margin, behind which they are fre- 

 quently annul ated with one or two lines of growth ; they are 



* Synopsis of the Marine Invertebrata of Grand Manan, p. 9. t. 1. f. 3. . 



