108 



ANTHOZOA HYDROIDA. 



Brit Faun. 214. Stew. Elem. ii. 444. S. uniflora, Pott. 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, Lam. Anim. s. Vert. 

 ii. 113 ; 2de ddit. ii. 132. Flem. Brit. Anim. 548. Risso, 1'Europ. Merid. v. 309. 

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

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

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



Fig. 18. 



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



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

 have seen the antennae 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. 



