. Bulletin - United States National Museum. Science. I6G BULLETIN 100, UNITED STATES NATIONAL MUSEUM. Thorax with numerous strong longitudinal muscle bands and less well-developed transverse muscles underlying them. Abdominal muscles mainly longitudinal and gathered into less definite bands than on the thorax. Tentacles eight in number, of two orders placed alternately. Ad- ditional smaller ones were not certainly demonstrated. Dorsal languets removed about the width of three stigmata to the left of the median dorsal vessel. Branchial sac with 9 or 10 rows of stigmata; about 1G in a row on eac
. Bulletin - United States National Museum. Science. I6G BULLETIN 100, UNITED STATES NATIONAL MUSEUM. Thorax with numerous strong longitudinal muscle bands and less well-developed transverse muscles underlying them. Abdominal muscles mainly longitudinal and gathered into less definite bands than on the thorax. Tentacles eight in number, of two orders placed alternately. Ad- ditional smaller ones were not certainly demonstrated. Dorsal languets removed about the width of three stigmata to the left of the median dorsal vessel. Branchial sac with 9 or 10 rows of stigmata; about 1G in a row on each side in the anterior part, but one or two less in the most posterior rows. Stomach wall with a considerably larger num- ber (18 or 20) of longitudinal plications in its walls than in the case of Amarouciwm crateH- femm. The plications are narrow and some of them are often, if not usually, more or less irreg- ular in length and arrangement. No peculiarities of the reproductive organs were noted. Ovaries poorly developed in the specimens examined; situated in the anterior part of the abdomen. The testes form a double series along the common sperm duct in the part of the post-abdomen behind the ovaries. Localities of the Albatross specimens:. Feb. 15, 1908, 29 One colony (Cat. 113 Fig. 113. — Amaroc- cium mult1plica- tum (sluiter). Zooid. X 20. No. 84. Station (off Jolo Light, fathoms, coral sand). No. 5954, ). Nos. 86,163. Station D5145 (near Jolo Light, Feb. 15, 1908, 23 fathoms, coral sand and shells). Several colonies (Cat. Nos. 5953 and 5965, respectively, ). Several additional colonies in the United States National Museum were collected by Mr. S. F. Light on eel grass in Porta Galera Bay, Mindoro. Sluiter (1909) describes this ascidian from colonies from reefs at Tial, Ki Island, and Haingsisi, Saman Island. Except that they appear to have several more rows of stigmata (a character perhaps subject to variation with age as well as individually), the Albatr
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