Campanulakia. Z. HYDROIDA. 157 



Polypitloiu adhering; by creeping- tubulous fibres, erect, iiTegularly 

 branched, the stem and branches composed of many closely applied 

 parallel tubes ; branches erect or erecto-patent, cylindrical, straight, 

 hirsute from the capillary pedicles of the cells which originate in 

 whorls at stated intervals : the pedicles are ringed at top and bottom 

 but generally smooth about the middle, patent, simple : the cell itself 

 campanulate, thin and transparent with a serrated brim. Vesicles 

 scattered, arising- from the branches, solitary, very shortly stalked, 

 oval, smooth, with a narrow aperture. 



4. C. ? DUMOSA, erector climbing, ii^regularly branched, hirsute 

 with the cells, lohich are long, tubular, patent, almost sessile, the 

 aperture entire. Rev. Dr Fleminor. 



PLATEXXIII.Fig-. 2— 5. 



Coralliiiii astaci corniculorum semiili, Petiv. Plant. Ital. pi. 2, fig. 10 — 



Sertularla dumosa, Fleming in Edin. Phil. Jouni. ii, 83 Tubularia 



tubifera, Johnston in Edin. Phil. Journ. xiii. 222, pi. 3, fig. 2, 3 La- 



fea cornuta, Lamour. Soland. ^ooph. 5, pi. 65, fig. 12-14 Campanu- 



laria dumosa, Flem- Brit. Anini. 548. Johnston in Trans. Newc Soc ii. 

 254. pi. 11, fig. 1 La Laomedee touffue, Blainv. Actinol. 474. 



Hah. On rocks, shell-fish, and other corallines, in deep water. 

 On the shores of Devonshire, Montagu. At Newhaven in the Frith 

 of Forth, at Aberbrothick and in Zetland, Fleming. Berwick Bay, 

 ver}^ common, G. J. 



There are two varieties of this species : the first is from 2 to 4 inches 

 in height, bushy, irregularly branched, the branches straight, square, 

 slightly tapered upwards, and formed of several parallel tubes ; (Fig. 4.) 

 the second is a single thread-like tube which climbs up the stalks 

 of other flexible corallines, giving off on all sides its long spreading- 

 trumpet-shaped cells, which are not unlike those of C. syringa, but are 

 to be distinguished by their thicker and much more horny texture, and 

 by being almost or altogether sessile (Fig. 2, 3.) Small specimens 

 of the first variety are very common on some sorts of crabs, but the 

 larger specimens have their roots or base almost invariably immersed 

 in the substance of a sponge, the Halichondria panicea or papillaris. 

 Neither the vesicles nor polypes have been observed, and there is 

 something in the habit, and in the form of the cells, which renders it 

 very doubtful whether this species belongs to this order. 



This appears to be the proper place to notice two doubtful zoo- 

 phytes which have been I'eferred to the genus 



