. An account of the alcyonarians collected by the Royal Indian marine survey ship Investigator in the Indian Ocean. Alcyonaria. 92 1-12 mm. long, from O'll to 0'16 mm. broad, with few simple spines on the surface ; smooth, Hat, striated rods; and three-rayed forms with a few blunt teeth on the edges. (//) In the stalk there are spindles with a few spines and a very large number of smooth, flat, striated forms, with blunt teeth on the edges. Measure- ments are on an average about the .same as in stem canal walls. Colour—Stalk, stem and branches creamy-white; polyp-stalks, in their lower portion
. An account of the alcyonarians collected by the Royal Indian marine survey ship Investigator in the Indian Ocean. Alcyonaria. 92 1-12 mm. long, from O'll to 0'16 mm. broad, with few simple spines on the surface ; smooth, Hat, striated rods; and three-rayed forms with a few blunt teeth on the edges. (//) In the stalk there are spindles with a few spines and a very large number of smooth, flat, striated forms, with blunt teeth on the edges. Measure- ments are on an average about the .same as in stem canal walls. Colour—Stalk, stem and branches creamy-white; polyp-stalks, in their lower portions, speckled with red, in their upper portions slightly deeper red; polyp-spicules for the most part deep red, a few colourless ; polyps semi- transparent to white. Locality: Andamans. Dendronephthya pellucida, Henderson. The colony is almost complete, wanting only a few branches ; it measures 5-6 cm. in height and 41 cm. in maximum breadth. The short stalk is flabby, somewhat damaged, granular in appearance and about 1 cm. long. The polyi)arium is oval in outline and greatly flattened in one jjlane. It consists of a large num- ber of branches which increase in size towards the upper part of the polyparium. The arrangement of spicules on the stem is very characteristic, pro- ducing a peculiar network appearance ; this arrange- ment disappears in the branches, where the spicules tend to run parallel to the length of the branch. The polyps are arranged in small groups of three to thirteen, but five to nine are the common num- bers. The groups are arranged in larger groups in which all the polyps are so placed that they reach the surface of the polyparium. The surface of the larger groups is almost flat. The heads are low and oval, measuring on an average 0'48 mm. high and 0'56 mm. broad. They are placed at an obtuse angle on short stalks of about 0"5 mm. The spicules are arranged in the following manner : There are eight double rows in each of which there are four to five p
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Keywords: ., bookauthorthomsonjarthurjohnart, bookcentury1900, bookdecade1900
