History of British animals - University of Guam Marine Laboratory

j46 ZOOPHYTA. SERTULARIAD^. Plumularia,Gen.LXVI. ANTENNULARIA — Stem verticiilated, withslender simple branches ; cells distant.181. A. antennina.— Stem erect, simple or alternately branched; branches of the whorls slender, incurved.Corallina Astaci corniculorum semula, Raj/, Syn. Stirp. 34.—-Lobster'shorn Coralline, Ellis, Cor. 15. t. ix.— Sertularia an. Linn. Syst.i. 1310.Pall. El. 146.— Ant. indivisa and ramosa, Lam. Hist. 2. 123—Nemertesiaantennina and ramosa, Lamour. Cor. Flex. 163—On oyster-beds,common.Height upwards of a foot; stem either straight and simple, or slightlybranched, arising from a matted tubular root ;cells on the inside of the verticillatebranches, distant, unequal, slightly campanulate ; vesicles at the upperbase of the branches, pedunculated, ovate, with obliquely truncatedmouths.Gen. LXVII. PLUMULARIA.—Stems not verticiilated ;cells sessile, uniformly distributed on one side of the branch.* Stem simple.182. P. pluma. — Stem pinnated; cells cup-shaped, with adenticulated margin.Podded Coralline, Ellis, Cor. 13. t. xii. f. 12—Sertularia pluma, Linn.Syst. i. 1309. Pall. El. 149 Plumularia cristata, Lam. Hist. ii. 125.— Aglaophenia pluma, Lamour. Cor. Flex. 178—On fuci, near low watermark, rare.Height about two inches ;frond lanceolate ; branches alternate, simple ;cells with a wide mouth ; the vesicles are pedunculated, ovate, compressed,slightly bent, with a mesial band above and below, and transverse muricatedribs.183. P. pennatula.— Stem pinnated; cells cup-shaped, Avith adenticulated margin, supported on the under side by a lengthenedincurved spinous process.Sertularia pen. Sol. Ellis, Cor. 56. t. vii. f. 1, 2—P. pen. Lamark, Hist. ii.128 Aglaophenia pen. Lamour. Cor. Flex. 168.—Sert. pen. Flem. Edin.Phil. Journ. ii. 83 Shores of Devon, Mr Montagu.Height from about 3 to 6 inches ; stem of a brown colour, jointed ; branchesopposite, curved ; the cells are short and wide—The late Mr Montagu detectedthis species on the shores of Devon, in 1808, and to whom I am indebtedfor a specimen.184. P. fitlcata.'— Stems waved, dichotomouslydivided ;pinnatedby alternate branches ;cells subcylindrical,crowded.Sickle coralline, Ellis, Cor. 12. t. vii. f. 1 1. and t. 38. f. 5—Sertularia falc.Linn. Syst.i, 1309.— Pall. El. 144—PI. Mc. Lamark,ii. 123— Aglaopheniafal. Lam. Cor. Flex. 174— Very common on old shells, a little beyondlow Avater mark.Height nearly a foot ; weak, leaning cells ; closely connected along the sideof the branch, and divided by the joints into pectinated masses (thus approachinga Serialaria), the summits obliquely truncated; vesicles ovate,