. The British Tunicata; an unfinished monograph. Sea squirts; Tunicata. 36 BRITISH Tl'NICATA. nerves. Branchial aperture with six sharply-pointed lobes. Thorax and abdomen saffron-yellow in colour, united by a peduncle a little longer than the thorax. Stomach nearly globular, very simple, the intestine with two slight constrictions below the stomach before its upward, ventral bend. Diameter of mass one inch to two inches (25 to 50 mm.). Length of individuals half a line (1 mm.). Hull.—Investing Madrepores. ENGLAND.—Scilty Islands (C-arvs). /'V/'x/ record.—-Cams, 1850. This species is admitted
. The British Tunicata; an unfinished monograph. Sea squirts; Tunicata. 36 BRITISH Tl'NICATA. nerves. Branchial aperture with six sharply-pointed lobes. Thorax and abdomen saffron-yellow in colour, united by a peduncle a little longer than the thorax. Stomach nearly globular, very simple, the intestine with two slight constrictions below the stomach before its upward, ventral bend. Diameter of mass one inch to two inches (25 to 50 mm.). Length of individuals half a line (1 mm.). Hull.—Investing Madrepores. ENGLAND.—Scilty Islands (C-arvs). /'V/'x/ record.—-Cams, 1850. This species is admitted on the authority of Victor Cams as the fact of its having been found in the Gulf of Suez does not seem a sufficient reason for doubting' its occurrence in British Fi«. 104.—Didemnmn cainliilnni. Natural size1. (Savigny, pi. iv, f. 3.) Savigny describes it as being opaque, fungous, or spongeous, spreading over and more or less enveloping the steins of madrepores in milk-white incrustations, its surface covered with prominent nipples arranged in six rays and disposed nearly in quincunx. The individuals, or polypes as he calls them, are, he says, yellow and very small, scarcely equalling in volume two poppy seeds, one for the thorax, the other for the abdomen and ovary together. The branchial aperture resembles a funnel with its limb or upper margin cut out into six very simple teeth, which are expanded and pointed. The thorax is short, rounded, and furrowed transversely, the back very gibbous and divided by a longitudinal depression, the front hollowed out below the tubercle. The abdomen is larger than the thorax and nearly horizontal in. 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 Alder, Joshua, 1792-1867; Hancock, Albany, 1806-1873; Hopkinson, John, 1844-1919; Norman, Alfred Merle, 1831
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectseasqui, bookyear1912
