ZOOPHYTA. SERTULARIADiE. 
subdivided and panicled; cells subcylindrical, obliquely trun- 
cated, 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 each 
side. 
171. 1). argentea . — Stem with alternate branches, which are 
subdivided 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 close 
and panicled ; cells subopposite, diverging ; vesicles oval ; nearly related to 
the preceding, of which, by many, it is supposed to be a variety. 
17^. D. operculata . — Dichotomously branched, divisions dis- 
tant ; cells 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 exter- 
nally ; vesicles ovate, narrow at the base, rounded at the summit, with a short 
tubular operculated centre. 
173. D. pumila . — Irregularly branched bifariously ; cells op- 
posite, subcylindrical, diverging and free towards the aperture, 
which is blunt and emarginate. 
Sea oak coralline, Ellis, Cor. J. t. v. f. 8.— Sertularia pum. LAnn. Syst. i. 
1306. Pall. El. 130 — Dynamena pum. Lamour. Cor. Flex. 179 — On 
Fucus serratus, common. 
Height about an inch ; growth tufted ; each cell seems jointed towards the 
base ; vesicles subglobular, with a narrow foot-stalk, and a slightly contracted 
truncated summit. 
174. Jy. rosacea . — Thinly branched bifariously; cells oppo- 
site, cylindrical, and spreading. 
Lily coralline, Ellis, Cor. 8. t. iv. f. 8. — Sertularia ros. Linn. Syst. i. 1306. 
S. nigellastrum, Pall. El. 129 — Dynamena ros. Lamour. Cor. Flex. 178. 
On old shells beyond low water-mark. 
Height two or three inches ; branches few ; cells, where united with the 
stem, becoming tubular and narrow, suddenly diverging nearly at right 
angles, and slightly truncated at the extremity ; the vesicles are subcylindri- 
cal, slightly enlarged at the summit, with several spinous processes. 
175. Jy.jilicula . — Dichotomously branched, with a cell in the 
angle ; branches short ; ceils opposite, oval, diverging, with a 
tubular 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, contract- 
ed towards the orifice, which is slightly tubular, with a wrinkle or depression 
