VAN NAME: SIMPLE ASCIDIANS. 585 
The two following species belong in the genus Styelopsis Traustedt, 
1883, distinguished by the reduction of the folds and vessels of the 
branchial sac, and the tubular unbranched gonad. It is not recog- 
nized as distinct from Dendrodoa in Hartmeyer's classification which 
is adopted in this paper. 
Dendrodoa carnea (Agassiz). 
PI. 64, fig. lU-117; PI. 72, fig. 158; text-fig. 40. 
1850. Ascidia carnea Agassiz, Proc. Amer. Assoc. Adv. Sci., vol. 2, p. 159. 
1852. Cynthia gulta Stimpson, Proc. Boston Soc. Nat. Hist., vol. 4, p. 231. 
1870. Cynthia placenta (part) + (probably) Cynthia gutta Verrill, Amer. 
Journ. Sci., ser. 2, vol. 49, p. 424. 
1870. Cynthia gutta + Ascidia carnea Binney, Gould's Invertebrata of Massa- 
chusetts, pp. 19, 25, pi. 24, figs. 334, 335. 
1870. Ascidia carnea + Cynthia gutta Dall, Proc. Boston Soc. Nat. Hist., 
vol. 13, p. 255. 
1871. Cynthia carnea (part) Verrill, Amer. Journ. Sci., ser. 3, vol. 1, p. 94, 
fig. 9 (not figs. 7, 8). 
1871. Cynthia carnea Verrill, Amer. Journ. Sci., ser. 3, vol. 2, p. 362. 
1872. Cynthia carnea Verrill, Bull. Essex Inst., vol. 3, p. 5. 
1872. Cynthia carnea (part) Verrill, Amer. Journ. Sci., ser. 3, vol. 3, p. 213. 
1873. Cynthia carnea (part) Verrill and Smith, Rept. on Invertebrate Ani- 
mals of Vineyard Sound, pp. 495, 701, pi. 33, fig. 247 (not 248). 
1874. Cynthia carnea Verrill, 6th Ann. Rept. Peabody Acad. Sci., p. 60. 
1879. Halocynthia tuberculum VerriU, Preliminary Check-list of Marine 
Invertebrates, p. 27. 
1879. Halocynthia tuberculum (part) Verrill, Bull. U. S. Nat. Mus., no. 15, 
p. 148. 
1879. Halocynthia tuberculum (part) Verrill, Proc. U. S. Nat. Mus., vol. 2, 
p. 197. 
1891. Cynthia carnea Herdman, Journ. Linn. Soc. London, ZooL, vol. 23, 
p. 586 (fisted as imcertain species). 
1900. Cynthia carnea MetcaK, Zool. Jahrbiicher, Anat., vol. 13, p. 511, 
pi. 35, figs. 16, 17. 
1901. Halocynthia tuberculum (part) Whiteaves, Geol. Survey Canada, publ. 
no. 722, p. 269. 
1901. Cynthia {Halocynthia) tuberculum (C carnea) King.sley, Proc Portland 
Soc. Nat. Hist., vol. 2, p. 183. 
1903. Dendrodoa aggregata (part) Hartmeyer, in Romer and Schaudinn, 
Fauna Arctica, vol. 3, p. 235. 
1909. Dendrodoa aggregata (part) Hartmeyer, Bronn's Tier-reich, vol. 3, 
suppl., p. 1361. 
Body greatly flattened dorso-ventrally, having the form of a very 
depressed cone, or often almost disk-like, attached by the entire 
