. An account of the alcyonarians collected by the Royal Indian marine survey ship Investigator in the Indian Ocean. Alcyonaria. 32 many of the ovals and four-sided forms send out irregular somewhat flattened branches which may again branch. Some measurements are : Spindles 1'2 mm. X 024 nmi. ; rods 0'48 mm. x O'lo mm.; clubs 042 mm. x 0'21 mm. ; ovals up to 06 mm. x 03 mm. Canal-wall spicules : (a) In the stem ai'e short, thick si)in(lles, thickly covered with regularly arranged rough warts and measuring up to IS mm. x 0"3 mm. ; also a few small globular forms with fewer and less rough wa
. An account of the alcyonarians collected by the Royal Indian marine survey ship Investigator in the Indian Ocean. Alcyonaria. 32 many of the ovals and four-sided forms send out irregular somewhat flattened branches which may again branch. Some measurements are : Spindles 1'2 mm. X 024 nmi. ; rods 0'48 mm. x O'lo mm.; clubs 042 mm. x 0'21 mm. ; ovals up to 06 mm. x 03 mm. Canal-wall spicules : (a) In the stem ai'e short, thick si)in(lles, thickly covered with regularly arranged rough warts and measuring up to IS mm. x 0"3 mm. ; also a few small globular forms with fewer and less rough warts. {/>) Those of the stalk may be divided into two series, a rough and a smooth—the rough similar to the stalk cortical spicules, spindles, clubs, ovals, etc., the spindles measuring up to 08 mm. x 018 mm.—the smooth series containing irregular, flat spindles, measuring 0"42 mm. x 012 mm., irregular flat three- and four-rayed forms, oval and triangular forms, all of which may be greatly branched. Colour—Stalk and principal branches dark Iirownish-grey; stem and smaller branches a lighter shade of the same ; polyp-stalks and polyps reddish- brown ; tentacles greyish. Locality : Andamans Coast, 13 fathoms. Dendronephthya arbuscula, Henderson. The colony is large, somewhat bush-shaped, mostly developed in one plane, with a long stalk, and measures 11 cm. in length and 8 5 cm. in maximum Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Thomson, J. Arthur (John Arthur), 1861-1933; Investigator (Ship); Indian Museum; Henderson, W. D. (William Dawson). Calcutta, Printed by order of the Trustees of the Indian Museum
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Keywords: ., bookauthorthomsonjarthurjohnart, bookcentury1900, bookdecade1900
