BRITISH ZOOPHYTES. 223 



Hab. : Nortliuinberland and Durham Coasts. 



This species greatly resembles the preceding. It 

 grows to a height of ^ inch. The operculum is trian- 

 gular in shape, with the angles somewhat rounded, 

 and is ornamented with a vandyked, fan-shaped pattern. 



Each cell is surmounted by a spine. The ooecia are 

 ornamented with radiating lines. 



5. S. EEPTANS, Linn. Plate XVII. fig. 5. 



Sertularia reptans {Linn., Fabr., Tiirt., Stew.), S. 

 repens (Berkenhouf), Cellularia reptans {Pall., Reid, 

 Smitt, Flem., Dal, G. J., P. H. O., D. L., R. Q. C), 

 Cellaria reptans {E. and S., Latnlt., Stark), Scruparia 

 reptans {Ohen), Crisia reptans {Lamx., Temp.), Aca- 

 marchis Geoffroyi {Andouin , Savigny) ,^\CQ\\div'\?i reptans 

 {De B.), Canda reptans {Gray, Bush, McA.), Bicellaire 

 rampante {De B.). 



Hab. : Common, on stones, shells, and other zoo- 

 phytes. 



This is the '^Creeping Coralline '' of Ellis (Corall., 

 37). The cells are oval, with three spines on the outer 

 margin. There is a small avicularium behind the 

 spines. The operculum is very curious, being well 

 described by Mr. Hincks as " antler-shaped.^^ The 

 colour is light grey, occasionally tinged with red. The 

 ooecia are globose and ornamented with punctures. 

 The zoarium is attached to the object upon which it 

 grows by tubular roots, some of whicb^ as Ellis found 

 out, are " full of hooks the better to secure it when it 

 adheres to soft spongy substances. ^^ 



At the points of division of the branches are tubular 

 processes serving as hinges to prevent strain upon the 

 zoarium by the motion of the waves, &c. 



" When this zoophyte is put into vinegar, a strong 



