596 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Phallusia obliqua (Alder). 
PI. 65, fig. 127; PI. 66, figs. 128, 131; PI. 72, figs. 154, 155; text-fig. 41. 
1863. Ascidia obliqua Alder, Ann. Mag. Nat. Hist., ser. 3, vol. 11, p. 154. 
1873. Ascidia n. sp. Verrill, Amer. Journ. Sci., ser. 3, vol. 6, p. 440. 
1874. Ascidia mollis Verrill, Amer. Journ. Sci., ser. 3, vol. 7, pp. 409, 413, 
499, 504. 
1874. Ascidia mollis Verrill, Proc. Amer. Assoc. Adv. Sci., vol. 22, pp. 390, 
(348, 352), pi. 1, fig. 5. 
1879. Ascidia mollis Verrill and Rathbun, Proc. U. S. Nat. Mus., vol. 2, 
p. 231. 
1880. Ascidia falcigera Herdman, Proc. Roy. Soc. Edinburgh, vol. 10, p. 469. 
1882. Ascidia falcigera Herdman, Challenger Rept., Zool., vol. 6, p. 211, pi. 
32, fig. 1-6. 
1882. Ascidia 7nollis Baird, Rept. U. S. Coram. Fish and Fisheries for 1879, 
p. 805. 
1889. Ascidia mollis MacDonald, Rept. U. S. Comm. Fish and Fisheries 
for 1886, p. 856. 
1891. Ascidia falcigera + A. mollis + A. obliqua Herdman, Journ. Linn. 
Soc. London, Zool., vol. 23, pp. 592, 594, 596. 
1901. Ascidia falcigera Whiteaves, Geol. Survey Canada, publ. no. 722, 
p. 267. 
1901. Ascidia mollis Kingsley, Proc. Portland Soc. Nat. Hist., vol. 2, p. 183. 
1903. Ascidia obliqua Hartmeyer, in Romer and Schaudinn, Fauna Arctica, 
vol. 3, pt. 2, p. 280, pi. 5, fig. 18; pi. 12, fig. 7-12. 
1905. Ascidia obliqua Bjerkan, Bergens Mus. Aarbog, 1905, no. 5, p. 14. 
1906. Ascidia obliqua Redikorzew, Trav. Soc. Nat. St. Petersbourg, vol. 37, 
pp. 154, 309, 310. 
1907. Ascidia obliqua Redikorzew, Ann. Mus. Zool. Acad. St. Petersbourg, 
vol. 11, pp. 142, 151-153. 
1907. Ascidia obliqua Redikorzew, Zool. Anzeiger, vol. 31, p. 522. 
1908. Ascidia obliqua Redikorzew, Trav. Soc. Nat. St. Petersbourg, vol. 39, 
pp. 22, 29, 42. 
1908. Ascidia obliqua Redikorzew, Mem. Acad. Imp. Sci. St. Petersbourg, 
ser. 8, cl. phys.-math., vol. 18, no. 11, p. 41. 
1908. Ascidia obliqua Bjerkan, Tromsoe Mus. Aarshefter, no. 25, pp. 79, 
114, 115. 
1909. Phallusia obliqua Hartmeyer, Bronn's Tier-reich, vol. 3, suppl., p. 1403. 
1912. Phallusia obliqua Hartmeyer, Vidensk. Meddel. Naturhist. For. 
iM Kjobenhaven, vol. 63, p. 276. 
Not Ascidia obliqua Heller, 1874. Not Ascidia mollis Hancock, 1870. 
Body oval, elliptical, or more or less oblong in outline, usually 
attached by a considerable area on the left ventral region, sometimes 
by the whole side; not usually as much flattened as in the case of the 
