History of British animals - University of Guam Marine Laboratory

544 ZOOPHYTA. SERTULAMADjE. Dynamena.subdivided and panicled ; cells subcylindrical, obliquely truncated,and rather close to the stem.Sea cypress, Ellis, Cor. 7 —Sertularia cup. Linn. Syst.i. 1308. Pall.El. 141. Lamour. Cor. Flex. 192—Common on oyster-beds.Height upwards of a foot ; subordinate branches twice or thrice divided ;the cells are short, subopposite ; the vesicles are narrow at the base, ovate,truncated, with a subtubular orifice, and a wing-like pointed process at eachside.171. D. argentea.— Stem with alternate branches, which aresubdivided and panicled;cells conical, diverging, pointed.Squirrel's tail, Ellis, Cor. 6. t. ii. f. 4.— Sertularia cupressina, var. arg.Linn. Syst.i. 1308. Pall. El. 141—Sert. arg. Lamour. Cor. Flex. 192.— Common on oyster-beds.Height upwards of a foot ; branches sometimes thin and bifarious, or closeand panicled; cells subopposite, diverging; vesicles oval; nearly related tothe preceding, of which, by many, it is supposed to be a variety.172. D. opcrcidata.— Dichotomously branched, divisions distantcells ;opposite, inversely conical, truncated.Sea-hair, Ellis, Cor. 8. t. iii. f. 6 Sertularia op. Linn. Syst.i. 1307.— S.usneoides, Pall. El. 152. — Dynamena op. Lamour. Cor. Flex. 176. —Common about low water-mark, on fuci.Height two or three inches; growth usually in tufts; cells pointed externally;vesicles ovate, narrow at the base, rounded at the summit, with a shorttubular operculated centre.173. D. pumila.— Irregularly branched bifariously; cells opposite,subcylindrical, diverging and free towards the aperture,which is blunt and emarginate.Sea oak coralline, Ellis, Cor. J. t. v. f. 8. — Sertularia pum. Linn. Syst. i.1306- Pall. El. 130 Dynamena pum. Lamour. Cor. Flex. 179."—OnFucus serratus, common.Height about an inch ; growth tufted ; each cell seems jointed towards thebase; vesicles subglobular, with a narrow foot-stalk, and a slightly contractedtruncated summit.174. D. rosacea.— Thinly branched bifariously; cells opposite,cylindrical, and spreading.Lily coralline, Ellis, Cor. 8. 129— t. iv. f. 8—Sertularia ros. Linn. Syst.i. 130C.S. nigellastrum, Pall. El. Dynamena ros. Lamour. Cor. Flex. 178.On old shells beyond low water-mark.Height two or three inches ; branches few ; cells, where united with thestem, becoming tubular and narrow, suddenly diverging nearly at rightangles, and slightly truncated at the extremity the vesicles are ;subcylindrical,slightly enlarged at the summit, with several spinous processes.175. T>.Jilicula.— Dichotomously branched, with a cell in theangle; branches short; cells opposite, oval, diverging, with atubular orifice.Sertularia fil. Sol. Ellis, Zooph. 57. t. vi. f. c. Lamour. Cor. Flex. 188—On the stems of fuci, about low water-mark; not common.Height about an inch ; branches alternate ; cells wide at the base, contractedtowards the orifice, which is slightly tubular, with a wrinkle or depression