108 



ANTHOZOA HYDROIDA. 



Brit. Faun. 214. Stew. Elem. ii. 444.— S. unifloi-a, Pall. Elench. 121, Ellis in 

 Phil. Trans. Ivii. 437, pi. 19, fig. 9.— Clytia volubilis, Lamour. Cor. Flex. 202. 

 Expos. Meth. 13, pi. 4, fig. e,f. — Campanularia volubilis, Lain. Anim. s. Vert. 

 ii. 113 ; 2de ^dit. ii. 132. Flem. Brit. Anim. 548. Risso, TEurop. Merid. v. 309. 

 Johnston in Trans. Newc. Soc. ii. 255. Templeton in Mag. Nat. Hist. ix. 466. 

 Coui-h Zooph. Cornw. 22 ; Corn. Faun. 40, pi. 11, fig. 1. Van Beneden Campan. 

 36, pi. 3, fig, 7, 8. — Blainv. Actinolog. 472, pi. 84, fig. 2. 



Fig. 18. 



•^jj^ 



Hah. Parasitical on other corallines and sea-weeds, frequent, 

 A minute species, and a beautiful object for the microscope. I 

 have seen the antenna3 of a crab (Lithodes spinosa) so profusely in- 

 vested with this zoophyte as to resemble hairy brushes. The coral- 

 line in this instance had chosen a station by which it obtained all 

 the benefits of locomotion. Our figure represents a specimen which 

 had adorned in a similar manner the remnant of a Plumularia fal- 

 cata. The stem is a capillary corneous tube which creeps and twists 

 itself upon its support, throwing out, at alternate intervals, a long 

 slender stalk twisted throughout or only partially, that supports a 

 bell-shaped cup of perfect transparency and prettily serrulated 

 round the brim. The ovarian vesicles arise from the creeping tube, 

 are sub-pedicellate, ovate, coarsely wrinkled, and contain each 

 several ova. Polypes with numerous slender white tentacula. 



The stalks are sometimes almost even and smooth, with a few 

 distant septa, and a single rounded joint just below the cell. Mr. 



