124 Z. HYDROIDA. Sektularia. 



Zooph. 52. BeTk. Syn. i. 216. Fahr. Faun. Groenl. 443. Turt. Gmel. 



iv. 678. Wem. Mem. i. 364. Tar^ Brit. Faun. 213. Stew.Eiem.n. 



442. Lam. Anim. s. vert. ii. 121. 2d edit. ii. 149. Bosc, Vers, iii. 108. 



Flem. Brit. Anim. 542. Hogg's Stockton, -32. Johnston in Trans. Newc 



Soc ii. 257, pi. 11, fig. 3 Clytia rugosa, Lamour. Cor. Flex. 204. 



Corallina, 89. Templeton in Mag. Nat. Hist, ix 466 La Campanu- 



laire rugueux, Blainv. Actinol. 473. 

 Hab. Parasitical on Flustrae, Sponges and Fuci at low water-mark, 

 common. Brighthelrastone, Ellis- Near Hai'tlepool, common, Mr 

 Hogg. Leith shore, Jameson. Shores of N. Durham and Berwick- 

 shire. 



A small species not exceeding an inch in height, and well distin- 

 guished by its strongly wrinkled cells which resemble a barrel in 

 miniature. Polypidoms gregarious, the shoots united by a radical 

 branching fibre, erect or creeping, obliquely twisted or ringed between 

 the cells, simple or sparingly branched, the branches irregular, pa- 

 tent. Cells crowded, alternate, subsessile, ovate, coarsely wrinkled, 

 especially when dried, contracted at the orifice which is obsoletely 

 tridentate. The ovarian vesicles are sparingly evolved, and differ 

 from the cells only in being a little larger, and in having three teeth 

 in the opening at the top of each. As a parasite it does not confine 

 itself to Flustra foliacea^ as Pallas would have us to believe, but in- 

 fests the roots and stems of many sea- weeds. 



* * Cells in pairs, opposite or semialternate. 

 5. S. ROSACEA, cells opposite, tubulous, the upper half free and 

 divergent, the aperture entire, truncate ; vesicles croicned with 

 spines. Ellis. 



Plate IX. Fig. 1, 2. 

 Lily or Pomegranate-flowering Coralline, Ellis, Corall. 8, no. 7, pi. 4, fig. 



a, A. Phil. Trans, abridg. x. 492, pi. 12, fig. 5, s — H Sertularia 



rosacea, Lin. Syst. 1300. Ellis and Soland. Zooph. 39. Berk. Syn. 

 i. 215. Turt. Gmel. iv. 676. Turt. Brit. Faun. 212. Wern. Mem. i. 

 564. Stew. Elem. ii. 440. Lam. Anim. s. Vert. ii. 119. Bosc, Vers, 

 iii. 105. Hogg's Stockton, 32. Johnston in Trans Newc. Soc. ii. 258. 



Templeton loc. cit. 468 Sert. nigellastrum. Pall Elench. 129.. 



Sert. abietina ? Fabric. Faun. Grcenl. 442. — Dynamena rosacea, La- 



mour. Cor. Flex. 175. Corallina, 79. Flem. Brit. ;Anim. 544. La 



Dynamene rosacee, Blainv. Actinol. 484. 

 Hah. Frequent on Corallines, and occasionally on old shells, from 

 deep water. At Brighthelmstone adhering to oyster-shells, Ellis. 

 Scarborough, Mr Bean. A rare species near Hartlepool, Hogg. 

 Coast at Dunstanborough Castle, Mr R, Embleton. Leith shore, 

 Jameson. Shore of Belfast Lough, Templeton. Coast of Berwick- 

 shire and N. Durham. 



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