Actinia. Z. HELIANTHOIDA. 211 



Dan. prod. 231, no. 2793. Turt. Gmol. iv. 104. Flem. Brit. Anim. 

 497. Cuv. Reg. Anim. iii. 292. Bosc, Vers, ii. 255. Johnston in 

 Trans. Newc. Soc. ii. 243. Dalyell in Edin. New. Phil. .lourn. xvii. 

 41] ; and in Proc. Brit. Assoc. 1834, 599. Templeton in Mag. Nat. 



Hist. ix. 303. A- mesembryanthemiim, Ellis and Soland. Zooph. 4. 



Turt. Brit. Faun. 131. Rapp, Polyp. 52, taf. 2, fig. 1. J ohiiston in 



Mag. Nat. Hist. viii. 81, fig. 12 A. hemispherica, Pen. Brit. Zool. 



iv. 104. Berk. Syn. i. 186. Hogg's Stock. 30 A. rufa. Mull. Zool. 



Dan. prod. 231. Zool. Dan. tab. 23, fig. 1-^. Pen. Brit. Zool. iv. 105. 

 Jameson in Wern. Mem. i. 558. Stew. Eleni. i. 393. Lam, Anim. s. 

 Vert. iii. 67. Stark, Elem. ii. 412. Rapp, Polyp. 53. Boget, Bridgevv. 



Treat, i. 198. fig. 86, 87 A. Anemone, Pm. Brit. Zool. iv. 106. 



Hogg's Stock. 30 A. corallina, Risso, L'Europ. Merid. v. 285 



A. margaritifera, Templeton in Mag. Nat- Hist. ix. 304, fig. 50 Com- 

 mon Actinia, Buckland, Bridgew. Treat, ii. 89, pi. 54, fig. 4 Hydra 



mesembryantliemum, AVew. Elem. ii. 451. Small red Sea- Nettle, Wal- 

 lis. Hist, of Nortliumb. i. 374. 

 Var. ^. Body paler striped longitudinally \\dth white ; tentacula annulated 

 with white. 



Vignette, No. 29, page 205. 

 Actinia viduata, Mull. Zool. Dan. prod. 231, no. 2799. Zool. Dan. pi. 

 63, fig. 6-8, — copied in Encyclop. Method, tab. 72, fig. 4, 5. Johnston 

 in Mag. Nat. Hist. viii. 82, fig, 13. Turt. Gmel. iv. 101. Lam. Anim. 

 s. Vert. iii. 68. Bosc, Vers, ii. 256. 

 Hub. On rocks between tide-marks, very common. 

 Body one or one and a half inch in diameter, hemisphei'ical when 

 contracted, when relaxed forming a short cylinder with a breadth 

 gi'eater than the height, of a uniform liver-colour or often olive-green, 

 and sometimes streaked with blue or greenish lines, either continu- 

 ous, or in spots : the base generally of a greenish colour encircled 

 with an azure-blue line, but it is often also streaked with red, and the 

 blue marginal Une is wanting. The tentacula, when fully extended, 

 are nearly equal to the height of the body, and of the same colour. 

 The tubercles within the margin of the oral disk are formed by pa- 

 pillary projections of the parenchyma of the body, covered over on 

 the top with a thick layer of dense blue matter : in it, as well as in 

 the skin generally, minute fusiform calcareous spicula, some slenderer 

 than others, may be detected in abundance with the microscope. 



In its young state, A. mesembryanthemum is liable to greater va- 

 riations in colour than when mature. One of these varieties, as it 

 seems to me, constitutes the A. viduata of Muller, distinguished by 

 its light olive body striped with white ; while the tentacula are pret- 

 tily ornamented with white and olive green rings. This variety usu- 

 ally attaches itself to shelving rocks, where it is covered over and 

 concealed by a layer of sand, protruding the tentacula through a 

 small aperture at the surface opposite the mouth. On the recess of 



