CAMPANULARIADjE I LAOMEDEA. 101 



specimens from Mr. Bean, who states that it inhabits deep water, 

 where it grows attached to stones and shells by a fibrous base, and is 

 very rare. Hartlepool, Durham, J. Hogg, Esq. Cullercoates, Nor- 

 thumberland, J. Alder. On the rocks at Whitburn near Sunder- 

 land, Miss Dale. Youghal, Miss Ball. Dublin Bay, very rare, 

 A. H. H assail, Cornwall, apparently not rare, Couch. 



Polypidom between four and five inches in height, firm and 

 woody, black or dusky-brown, varnished, irregularly branched. 

 Stem and branches tapered, composed of many parallel twisted ca- 

 pillary tubes, the branches erecto-patent, spreading laterally, pin- 

 nate ; pinnae rather close, alternate, two or three from each space 

 between the joints, and each divided into two branches. Cells 

 rather distant, adnate, cylindrical, widening outwards, smooth, with 

 an entire slightly everted margin : there is a small cell in the axils 

 of the pinnae, and a denticle at the base of all the cells, each of 

 which occupies a joint. Vesicles scattered, small, pear-shaped, the 

 rim of the opening plain. 



" The vesicles are numerously produced in March and April, on 

 the upper edges of the pinnae. They are small, ovoid, with pro- 

 longed terminal apertures." Couch. 



FAMILY CAMPANULARIAD.E. 



Genus SERTULARLE pars, Lin. Pall. Solander. Genus CAMPANULARIA, Lamarck, 

 Anira. s. Vert. ii. 112. Family SERTULARIES pars, Lamour. Expos. Method. 9. 

 SERTULARiADwE sect. ii. Flem. Brit. Anim. 538. SERTULARIS pars, Elaine. 

 Actinolog. 472. CAMPANULARIAD.E, Johnston in Trans. Berk. Club, p. 107. 

 Gray Syn. Brit. Mus. 76. Les CAMPANULAIRES, Van Beneden. Mem. p. 1 1 38. 



CHARACTER. Polypidoms plant-like, horny, rooted by a 

 creeping tubular fibre, branched or simple ; the Polype-cells thin 

 and campanulate, terminal, elevated on a ringed foot-stalk, 

 disposed either alternately or irregular : ova in horny decidu- 

 ous capsules. Polypes with a single series of filiform tentacula ; 

 the mouth proboscidiform. Embryo medusiform. 



13. LAC-MEDEA,"* Lamouroux. 



CHARACTER. Polypidom rooted by a creeping fibre, plant- 

 like, erect, jointed at regular intervals, the joints ringed, 

 incrassated, giving origin, alternately from opposite sides, to 

 the shortly pedicled cells : Cells campanulate : Vesicles axillary. 

 Polypes hydraform. 



., the name of one of the Nereids, according to Hesiod's Theogony, 



