100 NATURAL HISTORY OP 



Genus IV. Salacia, Lamouroux. 



Stem erect, composed of aggregated tubes Lrancliing. 

 Calycles distributed on all sides of the stem and 

 branches, cylindrical, sessile, without operculum, ad- 

 nate for the greater part of their length. — T. H. 



1. S. ABiETiNA, Sars. 



Campanularia abietina (Sars), Grammaria robusta 

 (Stimpson) , G. ramosa (Aid., McA.), G. abietina (Sars). 



Hab. : Northumberland, Berwick Bay (Aid.), Shet- 

 land (.4. M. H.). Height to 4 in. 



This species somewhat resembles L. dumosa. The 

 polypites are sulphur- coloured, with about 20 tentacles, 

 and are able to withdraw not only into their calycles, 

 but even into the stem. The calycles are arranged in 

 four or five longitudinal rows round the stem. 



Sars has fully described this species from specimens 

 obtained on the Norwegian coast. 



Genus V. Filellum, HincJcs. (Filum, a thread.) 



Stem creeping, filiform, reticulate, immersed in a 

 chitinous crust. Calycles tubular, decumbent, adherent, 

 without operculum, irregularly disposed on the stem, 

 to which they are attached at the base or by a short 

 stalk.— T. H. 



1. F. SERPENS, Has. 



Campanularia serpens (Has., P. H. O.), Oapsularia 

 serpens (Gray), Reticularia immersa (Wyville Thomson, 

 P. H. O.), R. serpens (T. H, McA.). 



Hab. : Very common. Parasitic on zoophytes. 



Described by Prof. Wyville Thomson in Ann. of Nat. 

 Hist., 2nd ser., xi. 443. " It is the common parasite of 

 some of the larger Sertularians, and especially of S. 

 abietina" The stem is very slender. The appearance 



