542 ZOOPHYTA. SERTULARIAD^. Sertularia. 



Height scarcely an inch ; shape of the cells like a bull's hom, the base nar- 

 row, slightly curved and enlarging to the summit, when it is bent inwards to 

 form a wide marginated orifice ; the bristle on the inferior margin is short. 



Gen. LXII. ANGUINARIA. — Stem adhering, irregular, 

 cells scattered, tubUlar, produced, with the orifice on the 

 side towards the extremity. 



162. A. anguina. — Stem branched, with irregular swellings, 

 from which the cells arise. 



Snake Coralline, Ellis, Cor. 43. t. xxii. f. 11.— Sertularia ang. Linn. Syst. 

 i. 1317 — Cellularia ang. Pall. El. 78 — Anguinaria spathulata, La- 

 marck, Hist. An. ii. 143 — Actea ang. Lamour. Cor. Flex. 153 On 



fuci, rare. 

 Cells cylindrical, a little swollen towards the rounded and closed extre- 

 mity, where it is slightly bent, on the upper side of which is a flat, mem- 

 branaceous, perforated space, the orifice of the cell. 



SERTULARIAD^. 



Gen. LXIII. SERTULARIA.— Cells alternate, usually with 

 a joint above and below each. 



163. S. polyzonias. — Loosely branched, cells smooth, not 

 crowded, wide at the base, with a produced subtubular mouth. 



Great tooth Coralline, Ellis, Cor. 5. t.ii. f. 3 — S. pol. Linn. Syst. i. 1312. 

 — S. ericoides, Pall. El. 127 — On dead shells and the roots of fuci, be- 

 yond low water-mark. 



Height seldom above two inches ; more or less branched irregularly ; the 

 produced cells give the branches a zig-zag apjiearance ; the margins of the 

 orifices of the cells are irregularly notched, and in some large specimens they 

 are slightly wrinkled across towards the summit ; the vesicles (as the ovaria 

 have been denominated) are placed irregularly on the sides of the branches, 

 ovate with a narrow base, wrinkled across, and denticulated at the summit. 



164. S. rugosa. — Loosely branched, cells wrinkled trans- 

 versely, crowded, ovate. 



Snail trefoil Coralline, Ellis, Cor. 26. t. xv. f. 23.— S. rug. Liniu Syst. i. 

 1308 — Pall. El. 126.— On fuci about low water-mark. 

 Height about an inch, irregularly attached to fuci ; the crowded ceUs give 

 the branches a very coarse aspect ; the margins of the orifices are jagged ; 

 the vesicles resemble those of the preceding species; but they are more deep- 

 ly wrinkled and notched at the summit. 



165. S. halecina. — Stem compound, pinnated by alternate 

 branches ; cells tubular, produced. 



Herring-bone Coralline, Ellis, Cor. 17. t. x S. hal. Li7in. Syst. i. 1308. 



—Pa//. El. 113 — Thoa hal. Lamour. Cor. Flex. 211.— Common, at- 

 tached to oyster shells. 



