354 PROCEEDINGS; BOSTON SOCIETY NATURAL HISTORY. 
spite of the luxuriant growth of these examples, the systems remained 
small, oval or elliptical in outline, and generally with easily distin- 
guishable limits. These colonies reached this development in but 
little more than three months. 
Cienus BoTRYLLOiDEs Mihie-Edwards, 1S41. 
Differs from Botryllus chief!}' in having elongated, more or less 
branching systems instead of small simple ones. 
Botrylloides aureum Sars. 
Text-fig. 2. 
1851. Botrj/Uoides aurea Sars, Nyt Mag. Naturvidensk., vol. 6, p. 15.3. 
1859. Botri/lloides aurea Sars, Forh. Videnskabs-Selsk. Christiania, 1858, 
p. 66. 
1873-74. Botryllus, new species, Merrill, Amer. Journ. Sci., ser. 3, vol. 6, p. 
440; vol. 7, p. 413. 
1874. Botryllus sp., Verrill, Proc. Amer. Assoc. Adv. Sci., vol. 22, pp. 348, 352. 
1879. Botryllus Yerrill, Preliminary Check-List of Marine Invertebrata, p. 27. 
1894. Botrylloides rriyosum Gottschaldt, Jena. Zeitschr., vol. 28, p. 344, pi. 
24. fig. 1. 
1896. Sarcobotrylloides aureum Huitfeldt-Kaas, Norske Nordhavs-Exp., 
Zool., vol. 23, no. 1, p. 25. 
1896. Sarcobotrylloides aureum Bonnevie, Norske Nordhavs-Exp., Zool., 
vol. 23, no. 2, p. 11. 
1897. Sarcobotrylloides aureum Yanhoffen, Drygalski's Gronland Exp., vol. 
2, pt. 1, p. 184. 
1901. Botryllus, species undetermined, Whiteaves, Catalogue of Marine 
Invertebrata, p. 266. 
1903. Sarcobotrylloides aureum Hartmeyer, in Rcimer and Schaudinn, Fauna 
Arctica, vol. 3, p. 263-266, pi. 6, figs. 15. 16, and 20; pi. 11, fig. 
1.3-19. 
1904. Sarcobotrylloides aureum Hartmeyer, Wiss. Meeresunters., Abt. Helgo- 
land, vol. 5, pt. 2. 
1905. Sarcobotrylloides aureum Bjerkan, Bergens Mus. Aarbog, no. 5, p. 13. 
1906. Sarcobotrylloides aureum Redikorzew, in Derjugin, Die murmansche 
biologische Station, Trav. Soc. Nat. St. Petersbourg, vol. 37, p. 155. 
1907. Sarcobotrylloides aureum Redikorzew, Ann. Mus. Zool. iVcad. Sci. St. 
Petersbourg, vol. 11, pp. 138, 151, 152. 
1908. Sarcobotrylloides aureum Bjerkan, Tromsoe Mas. Aarsheft, no. 25, pp. 
74, 115. 
1908. Sarcobotri/llnides aureum Redikorzew, Trav. Soc. Nat. St. Petersbourg, 
vol. 39, pp. 20, 27. 
1909. Sarcobotrylloides aureum Hartmeyer, Bronn's Tier-reich, vol. 3, suppl.. 
pp. 1.380, 1.381. 
