546 ZOOPHYTA. SERTULARIADiE. Plumularia » 
Gen.LXVI. ANTENNULARIA.--Stem verticillated, with 
slender simple branches ; cells distant. 
181. A. antennma.—’^tem erect, simple or alternately branch- 
ed ; branches of the whorls slender, incurved. 
Corallina Astaci corniculorum semula, Ray^ Sjn. Stirp. 34. — Lobster’s 
born Coralline, Ellis^ Cor. 15. t. ix. — Sertularia an. Linn. Sjst. i. 1310. 
Pall. El. 146. — Ant. indivisa and ramosa, Lam. Hist. 2. 123 — Nemer- 
tesia antennina and ramosa, Lamour. Cor. Flex. 163 — On oyster-beds, 
common. 
Height upwards of a foot; stem either straight and simple, or slightly 
branched, arising from a matted tubular root ; cells on the inside of the ver- 
ticillate branches, distant, unequal, slightly campanulate ; vesicles at the up- 
per base of the branches, pedunculated, ovate, with obliquely truncated 
mouths. 
Gen. LXVII. PLUMULARIA.— -Stems not verticillated ; 
cells sessile, uniformly distributed on one side of the branch. 
* Stem simple. 
18S. P. Stem pinnated ; cells cup-shaped, with a 
denticulated margin. 
Podded Coralline, ElUs^ 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 wa- 
ter mark, rare. 
FI eight about two inches ; frond lanceolate ; branches alternate, simple ; 
cells v/ith a wide mouth ; the vesicles are pedunculated, ovate, compressed, 
slightly bent, with a mesial band above and below, and transverse muricated 
ribs. 
188. P. pennatula . — Stem pinnated ; cells cup-shaped, with a 
denticulated margin, supported on the under side by a length- 
ened incurved 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 ; branches 
opposite, curved ; the cells are short and wide — The late Mr Montagu de- 
tected this species on the shores of Devon, in 1808, and to whom I am in- 
debted for a specimen. 
184. P.^/«Zmif£g.~Stems waved, dichotomously divided ; pin- 
nated by 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.Lamar1c., ii. 123 — Aglaophe- 
nia fal. Lam. Cor. Flex. 174 Very common on old shells, a little be- 
yond low water mark. 
Height nearly a foot ; weak, leaning ; cells closely connected along the side 
of the branch, and divided by the joints into pectinated masses (thus ap- 
proaching a Serialaria), the summits obliquely truncated ; vesicles ovate, 
