Serialaeia. ZOOPHYTA. SERTULARIADJE. 547 
slightly attenuated at the summit. Dr Grant has observed only two ova in 
each, “ large, of a light brown colour, semiopaque, nearly spherical, composed 
of minute transparent granules, ciliated on the surface, and distinctly irrita» 
ble.” 
185. P. setacea . — Stem pinnated ; branches alternate, a lit- 
tle bent ; cells minute, distant. 
Corallina setacea, Ellis^ Cor. 19. t. xi. f. 16., and t. xxxviii. f. 4 — Ser- 
tularia pinnata, Linn. Syst. 1312.— S. set. jPall. El. 148 — Plum. set. 
Lamarck^ Hist. ii. 129 — Aglaophenia set. Lamour. Cor. Flex. 172 — On 
fuci in deep water. 
Height about 3 inches ; stem simple, slender ; branches alternate, with a 
joint between each pair; cells short, distant, and slightly pointed externally ; 
vesicles oblong, subcampanulate, with spinous summits, the spines 10 to 12 
in number, base narrow, attached to the stem or at the upper side of the base 
of the branches. 
Stems ccympound. 
186. P. myriophyllum. — Stem slightly divided, pinnated, 
branches recurved ; cells cylindrical, adherent, supported at the 
base by a short obsolete spinous process. 
Pheasant’s Tail, Coralline, Ellis^ Cor. 14. t. viii. — Sertularia myr. Linn. 
Syst. i. 1309. Pall. EL 155. — P. myr. Lamarck^ Hist. ii. 124. — Agla- 
ophenia mjY. Lamour. Cor. Flex. 168 — On the English and Irish coast, 
in deep water. 
Height nearly a foot ; stem composed of tubes, closely adhering together ; 
at intervals swollen, marking, probably, the stages of growth ; branches sim- 
ple, alternate, curved ; cells with a joint between each, longitudinal, with an 
even mouth. 
187. Y .frutescens , — Stem slightly divided, pinnated; branches 
bending upwards ; cells cylindrical, adherent. 
Sert. frut. Sol. Ellis’s Zooph. 55. t. vi. f. a — S. gorgonia, Pall. El. 158. (in 
part.)— Aglaophenia frut. Lamour. Cor. Flex. 175— Scarborough, rare. 
Height several inches ; stem black and hard ; branches alternate ; the cells 
are narrower, and more remote than in the preceding species and are simple 
at the base. 
Gen. LXVIII. SERIALARIA.— Cells cylindrical, paral- 
lel, adjacent, in linear masses. 
188. S. lendigera . — Stem jointed, masses of cells distant, the 
margins united. 
Nit. Coralline, Ellis^ Cor. 27* t. xv. f. 24. — Sertularia lend. Linn. Syst. 
i. 1311. Pallas^ El. 124. — ^Seral. lind. AamarcA;, Hist. ii. 130.— Amathia 
lend. Lamour. Cor. Flex. 159. — On fuci beyond low-water mark. 
Height about an inch ; fine, dichotomously divided ; cells numerous, to- 
wards the upper part of each joint, the upper ones shortest. 
Mm2 
