. An account of the alcyonarians collected by the Royal Indian marine survey ship Investigator in the Indian Ocean. Alcyonaria. 116 show on their surface a peculiar pitted appearance under high power. There are also a few thicker spindles with rough warts. Canal-wall spicules : {a) The stem is apparently quite free of spicules. (fj) No spicule was found in the stalk. Colour—Stalk, stem and main branches yellowish-white ; tAvigs salmon- pink ; polyps A^hite, but appearing pink owing to the jMnkish spicules. Locality : Station 246, off Malabar Coast, 68-148 fathoms. Dendronephthya decipiens, Hen
. An account of the alcyonarians collected by the Royal Indian marine survey ship Investigator in the Indian Ocean. Alcyonaria. 116 show on their surface a peculiar pitted appearance under high power. There are also a few thicker spindles with rough warts. Canal-wall spicules : {a) The stem is apparently quite free of spicules. (fj) No spicule was found in the stalk. Colour—Stalk, stem and main branches yellowish-white ; tAvigs salmon- pink ; polyps A^hite, but appearing pink owing to the jMnkish spicules. Locality : Station 246, off Malabar Coast, 68-148 fathoms. Dendronephthya decipiens, Henderson. ni greatest A complete specimen measuring 4'9 cm. in height and 4-8 cm. breadth. The stalk is very short, TS cm. in length, thin-walled, with traces of stolons at the base, has a streaky appearance, is parchment-like in texture, and has its upper part hidden by reflexed lower branches. The polyjmrium is greatly flattened in one plane, circular in outline, and even of surface. It consists of two main branches and a large number of secondary branches—the two piin- cipal branches being in one plane, while the smaller branches arise all round the main branches and stem. Two lower branches are large, flattened, reflexed, leaf-like structures which have a very broad base and almost com- pletely surround the stem, leaving only two very small free spaces. Directly below one of these there is a small branch with cylindrical stalk and flattened upper portion which is slightly triangulai- in shape. The polyps are arranged in groups of three to eight, and may occur singly or in small groups on the edges of the flattened branches. They are low and round, 0-56 nuu. high and 0'64 mm. broad, and are placed at has an. Fig. 57. D. decipiens. an obtuse angle on the stalk which average length of a little over 1 mm. The spicules are arranged in two distinct ways. In the first, one to two pairs meet at a very obtuse angle, and above these rise eight double rows of three to four pairs eac
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Keywords: ., bookauthorthomsonjarthurjohnart, bookcentury1900, bookdecade1900
