Rev. T. Hiiiclcs on new British Hydroida. 297 



Suborder CAMPANULARIDA. 



Family CampaniilaridsB. 



Genus Campanularia. 



a. With free gonozooids, of the Obelia type. 



C. jlahellata, n. sp. 



Syn. Campanularia gelatinosa, Van Beneden, * Les Campanulalres,' 33, 

 pi. 1 & 2. 



Hydrocaulus filiform^ somewhat zigzag, branched, strongly 

 annulatcd above the origin of the branches, of a dark horn- 

 colour; branches given off at each bend of the stem, alternate, 

 flexuous, rather short and fan-shaped, divided and subdivided 

 dichotomously, and ringed above each division, forked imme- 

 diately above the point of origin, the arms of the fork tending 

 in opposite directions, and giving a subverticillate appearance 

 to the ramification. Hydrotheca alternate, short and subtri- 

 angular, with a wide aperture and an entire margin, borne on 

 ringed and tapering pedicels of variable length. Gonothecce 

 axillary, ovate, pedicellate, slightly flattened at the top, with a 

 short tubular orifice. The gonozooids are probably, like those of 

 C. geniculata and dichotoma, of the Obelia type. 



This species seems to have passed as a variety of C. dichotoma. 

 It is, however, separated from it by a group of distinctive cha- 

 racters — the subverticillate habit, the flabelliforra branches, the 

 flexuous stem, the short subtriangular calycle, and the much 

 larger size. C. flabellata attains a height of 8 or 10 inches. 



Hab. Tenby, on rocks in tide-pools (Alder) ; Scotland (Sir J. 

 Daly ell). 



* Gonozooids unknown. 

 C. gig ant ea, n. sp. 



Stem delicate, of a very light horn-colour and papyraceous 

 texture, annulatcd at the base and below the calycle, irregularly 

 and sparingly branched; branches erect, copies of the primary 

 shoot, sometimes themselves branched. Hydrothecce of enor- 

 mous size, deeply campanulate, very wide at the top and for 

 some way below it, and then tapering off gradually; length 

 about double the greatest width, the rim cut into numerous 

 broad and blunt teeth. Gonothecce unknown. 



Height about an inch. 



The calycles of this well-marked form are many times as large 

 as those of any other British species. 



Hab. Lamlash Bay, on shell (Prof. Wyville Thomson). 



Genus GoNOTHYEiEA, Allman. 

 G. hyalina, n. sp. 

 Shoots densely clustered on the creeping stolon, tall and 

 Ann. 6f Mag. N. Hist. Scr. 3. Vol. xviii. 21 



