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Show 104 ZOOLOGICAL COLLECTIONS MADE DURING [Jan. 4, species ; the stem is about 2 millims. thick at the base, and is strong and of a dark-brown colour there, but pale yellow at the apex ; the pedicle of the hydrophores {Allman) varies somewhat in length ; the first cup, followed by a joint, is generally succeeded by a rather long space devoid of cups, which then appear close together up to the number of four in some cases, in others at intervals as great as that between the first and second. Stem generally simple, but in the largest example (twisted round by several tubes, possibly foreign to it) at the base. Gonosome (not previously described). Gonophores inserted on pedicle of hydrophores, just below the first joint, by a stalk ; they are transversely oval in outline, and have a thin, very pale capsule. Hab. Sandy Point, 7-10 fathoms; on large worm-tube. SERTULARELLA JOHNSTONI, Gray. Sertulariajohnstoni, Gray, Dieffenbach's N e w Zealand, ii. p. 294. Several specimens, generally pale brown in colour; the hydrothecse moderately distant, and elongate and free to a great extent, tapering almost from base, or slightly swollen just above it; lateral teeth very small, lip sometimes ringed. Gonothecal tube varying from a short and straight to a prominent trumpet-shaped opening. Inter-nodes generally include a large number of calicles, joints very faintly marked; oblique rings of stem scanty, often wanting. A doubtful specimen from Sandy Point, 7-10 fathoms, has the calicle considerably swollen at base, and bent outwards at a spot about two thirds of its length from that point. Hab. Trinidad Channel, S W . Chili, 30 fathoms ; also Sandy point, 7-10 fathoms, on large worm-tube. SERTULARELLA POLYZONIAS. Sertularella kerguelenensis, Allman, Ann. & Mag. Nat. Hist. ser. 4, xvii. p. 113. S. polyzonias, Allman, Phil. Trans, clxviii. p. 282, footnote. Growing to upwards of an inch in height. The orifice of the gonangium forms a very short tube ; the annulation is continued to within°one quarter of the length from the pedicel. Several colonies. Represents the southern variety now united to S. polyzonias. Hab. Trinidad Channel, S.W. Chili, 30 fathoms., on a stiff stem {Fucus ?) ; and ? Sandy Point, 7-10 fathoms, on worm-tube (young, without gonangia). SERTULARIA TRISPINOSA. Sertularia trispinosa, Coughtrey, Trans. N.Z. Inst. vii. p. 284, pi. xx. figs. 14 & 15. Rises from a creeping fibre. Growth upright; branches very distinct, and given off equally on both sides. Maximum height quite 100 millims. No gonangia observed. Hab. Elizabeth Island, Straits of Magellan, 6 fathoms, on stem of seaweed, in company with Polyzoa. |