Discovery reports (1962) Discovery reports discoveryreports30inst Year: 1962 10M 200m Text-fig. 50. Pyura georgiana Michaelsen: A, section through the parietal organ to show vesicles (v.); B, part of a vesicle, at higher magnification, to show vacuolated cells (). Pyura bouvetensis (Michaelsen) (Text-fig. 47G, H, J; PI. IV, figs. 4, 5) Boltenia bouvetensis Michaelsen, 1904, p. 216, pi. 10, fig. 6; pi. 11, figs. 23, 24. Boltenia salebrosa Sluiter, 1905, p. 474; 1906, p. 45; 1906a, p. 554. Boltenia turqueti Sluiter, 1905, p. 474. Boltenia turqueti Hartmeyer, 1909-11, p. 1342; Sluiter, 1914,
Discovery reports (1962) Discovery reports discoveryreports30inst Year: 1962 10M 200m Text-fig. 50. Pyura georgiana Michaelsen: A, section through the parietal organ to show vesicles (v.); B, part of a vesicle, at higher magnification, to show vacuolated cells (). Pyura bouvetensis (Michaelsen) (Text-fig. 47G, H, J; PI. IV, figs. 4, 5) Boltenia bouvetensis Michaelsen, 1904, p. 216, pi. 10, fig. 6; pi. 11, figs. 23, 24. Boltenia salebrosa Sluiter, 1905, p. 474; 1906, p. 45; 1906a, p. 554. Boltenia turqueti Sluiter, 1905, p. 474. Boltenia turqueti Hartmeyer, 1909-11, p. 1342; Sluiter, 1914, p. 11; Arnback, 1938, p. 37; van Name, 1945, P- 331- IPyura legumen Kott, 1954, p. 124. Occurrence. St. 170: S. Shetlands, 342 m. St. 181: Palmer Archipelago, 160-335 m. St. 187: Palmer Archipelago, 259-354 m. St. 190: Palmer Archipelago, 93-126 m. and 315 m. St. 195; S. Shetlands, 391m. St. 599: S. Shetlands, 203 m. St. 600: S. Shetlands, 501-527 m. St. 1952: S. Shetlands, 367-383 m. St. 1955: S. Shetlands, 440-410 m. External appearance (Text-fig. 47 G; PI. IV, figs. 4, 5). The largest of the many specimens has a stalk of 21-o cm. and a body of 3-0 cm. long (antero-posteriorly) by 2-3 cm. high (dorso-ventrally). In the smallest complete specimen the stalk is 3-0 cm. and the body 1-2 cm. long by i-i cm. high. The stalk originates from the antero-ventral part of the body, is moderately thick here, and becomes gradually thinner towards the lower end. A stalk so slender and flexible could not support the body which may in fact rest on the bottom (Text-fig. 47 J). In appearance and texture the surface of the body varies from brown, wrinkled and fairly tough to pale ochre, smooth and so thin as to be semi- transparent. In the latter case the parietal organs, gut and branchial folds can be seen through the test. A slight swelling, small disc, or group of root-like processes serve to attach the stalk to the substratum. The surface of the test is beset with short conical spines each
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