. An account of the alcyonarians collected by the Royal Indian marine survey ship Investigator in the Indian Ocean. Alcyonaria. 98 0-04 to 012 mm. in width. The three-rayed measure about 048 mm. by 024 mm. Canal-wall spicules : («) In the stem there are spindles comparatively smooth or bearing few simple spines. They measure from 02 to 2"4 mm. in length and from 0-06 to 0-18 mm. in width. {/)) In the stalk there are thick spindles, three-rayed forms, golf-club and globular forms. The smaller are often of a stringy appearance, and they are all covered with blunt protuberances, eithe
. An account of the alcyonarians collected by the Royal Indian marine survey ship Investigator in the Indian Ocean. Alcyonaria. 98 0-04 to 012 mm. in width. The three-rayed measure about 048 mm. by 024 mm. Canal-wall spicules : («) In the stem there are spindles comparatively smooth or bearing few simple spines. They measure from 02 to 2"4 mm. in length and from 0-06 to 0-18 mm. in width. {/)) In the stalk there are thick spindles, three-rayed forms, golf-club and globular forms. The smaller are often of a stringy appearance, and they are all covered with blunt protuberances, either rough, blunt spines or branched warts. The spindles vary from 036 to 15 mm. in length and from 003 to 03 mm. in width. (^^"olour—The stalk, stem and branches are white ; the twigs pinkish ; the polyp-stalks generally red, but white in certain of the lower parts of the poly- parium ; the polyps and the polyp-spicules are white. Locality : N. Andaman Island. Dendroncphthya booleyi, Henderson. The specimen measures about 59 cm. in height and 38 mm. in greatest breadth. The stalk, 27 cm. long, is thick but very thin-walled. From its base it trives oif a number of thin-walled stolons which are often branched, and have fragments of shells attached to them. It is bluish-white to semi-transparent in colour and has a peculiar mesh-work ar- rangement on the surface. The polyparium is regular in outline, compact in appearance, oval in shape, and greatly flattened in one plane. The branch- ing is not profuse, the stem giving off a large branch on each side in the plane of flattening and then dividing at the tip into two short, thick branches which also lie in the plane of flattening. On the other two sides and on the lower portion of the stem all round there are also small; short branches. The branches divide into short, thick, secondary branches, which divide into blunt lobes on which the polyps are borne. The polyps are arranged in groups of four to nineteen, but groups of eigh
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Keywords: ., bookauthorthomsonjarthurjohnart, bookcentury1900, bookdecade1900
