VAN NAME: SIMPLE ASCIDIANS. 591 
Chelyosoma macleayanum Broderip and Sowerby. 
1830. Chelyosoma macleayanum Broderip and Sowerby, Zool. Journ., vol. 5, 
p. 46, pi. 3, fig. 4-6. 
1852. Ascidia geometrica Stimpson, Proc. Boston Soc. Nat. Hist., vol. 4, p. 229. 
1854. Ascidia geometrica Stimpson, Smithsonian Contr., vol. 6, p. 20. 
1860. Chelyosoma geometrica Stimpson, Smithsonian Check-list, p. 1. 
? 1864. Chelyosoma sp. Stimpson, Proc. Acad. Nat. Sci. Philadelphia, 1863, 
p. 161. 
1870. Chelyosoma geometricum Binney, Gould's Invertebrata of Massachu- 
setts, ed. 2, p. 26. 
1870. Chelyosoma geometricum Dall, Proc. Boston Soc. Nat. Hist., vol. 13, 
p. 255. 
1874. Chelyosoyna geometricum Verrill, Amer. Journ. Sci., ser. 3, vol. 7, p. 43. 
1874. Chelyosoma geometricum Verrill, Proc. Amer. Assoc. Adv. Sci., vol. 22, 
pp. 361, 363, pi. 1, fig. 6. 
1879. Chelyosoma geometrica Verrill, Preliminary Check-list of Marine 
Invertebrates, p. 27. 
1898. Chelyosoma macleayanu7n Bancroft, Proc. California Acad. Sci., ser. 3 
vol. 1, p. 309. 
1899. Chelyosoma macleayamon Hartmeyer, Zool. Jahrbiicher, Syst., vol. 12, 
p. 498, fig. j; pi. 23, figs. 9, 17. 
1901. Chelyosoma geometricum Whiteaves, Geol. Survey Canada, publ. no. 
722, p. 267. 
1901. Chelyosoma geometrica Kingsley, Proc. Portland Soc. Nat. Hist., vol. 
2, p. 183. 
1903. Chelyosoma macleayanum Hartmeyer, in Romer and Schaudinn, 
Fauna Arctica, vol. 3, p. 269. 
1905. Chelyosoma m,acleayanum Bjerkan, Bergens Mus. Aarbog, no. 5, p. 13. 
1906. Chelyosoma macleayanum Redikorzew, Trav. Soc. Nat. St. Petersbourg, 
vol. 37, pp. 155, 309, 310. 
1907. Chelyosoma macleayanum Redikorzew, Ann. Mus. Zool. Acad. St. 
Petersbourg, vol. 11, pp. 141, 151, 152, 154. 
1907. Chelyosoma macleayanum Redikorzew, Zool. Anzeiger, vol. 31, p. 521. 
1908. Chelyosoma macleayanum Bjerkan, Tromsoe Mus. Aarshefter, no. 25, 
pp. 75, 76, figs. 3, 4. 
1908. Chelyosoma macleayanum Redikorzew, Trav. Soc. Nat. St. Peters- 
bourg, vol. 39, pp. 21, 29. 
1908. Chelyosoma macleayanum Redikorzew, Mem. Acad. Imp. Sci. St. 
Petersbourg, ser. 8, cl. phys.-math., vol. 18, no. 11, p. 39. 
1909. Chelyosoma macleayanum Hartmeyer, Bronn's Tier-reich, vol. 3, suppl. 
p. 1392. 
Though Verrill (1874a) reports having found this species, no speci- 
men was discovered in the collections examined. The following details 
