VAN NAME: SIMPLE ASCIDIANS. 471 
and the States farther south. It inhabits muddy bottoms, burying 
itself in the mud. 
The locahties of the specimens are as follows : 
Station 921 (N. lat. 40° 07' 48", W. long. 70° 43' 54", 67 fathoms, green mud). 
Station 871 (N. lat. 40° 02' 54", W. long. 70° 23' 40", 115 fathoms, mud and 
fine sand). 
Stations 941 (N. lat. 40° 01', W. long. 69° 56', 79 fathoms, hard sand and mud). 
Station 878 (N. lat. 39° 55', W. long. 70° 54' 15", 142i fathoms, mud). 
Station 2559 (N. lat. 39° 48', W. long. 71° 48' 30", 120 fathoms, brown mud 
and sand). 
Caesira manhattensis (DeKay). 
PI. 45, fig. 11-13; PL 71, figs. 151, 152; text-figs. 4, 5. 
1838. Ascidia rustica Couthouy, (non Linnaeus), Boston Journ. Nat. Hist., 
vol. 2, p. 111. 
1841. Ascidia rustica Gould (non Linnaeus), Rept. Invertebrata of Mass., 
ed. 1, p. 319. 
1843. Ascidea manhattensis + A. rustica Gould (non Linnaeus), DeKay, 
Rep. Nat. Hist. New York, MoUusca, p. 259. 
1850. Ascidia amphora Agassiz, Proc. Amer. Assoc. Adv. Sci., vol. 2, p. 159. 
1860. Ascidia Manhattensis Stimpson, Smithsonian Check-list, p. 2. 
1869. Ascidia Manhattensis Perkins, Proc. Boston Soc. Nat. Hist., vol. 13, 
p. 160. 
1870. Ascidia Manhattensis + A. amphora Binney, Gould's Invertebrata 
of Mass., ed. 2, pp. 23, 25, pi. 24, fig. 333. 
1870. Ascidia amphora + A. manhattensis Dall, Proc. Boston Soc. Nat. Hist., 
vol. 13, p. 255. 
1871. Molgula Manhattensis Verrill, Amer. Journ. Sci., ser. 3, vol. 1, p. 54, 
fig. 1. 
1871. Molgula Manhattensis Verrill, Amer. Journ. Sci., ser. 3, vol. 2, p. 359. 
1871. Ascidia Manhattensis Perkins, Proc. Boston Soc. Nat. Hist., vol. 13, 
p. 160. 
1872. Molgula Manhattensis Verrill, Amer. Journ. Sci., ser. 3, vol. 3, p. 213. 
1873. Molgula Manhattensis Verrill and Smith, Rept. on Invertebrate Animals 
of Vineyard Sound, pp. 699, 311, 445, etc., pi. 32, fig. 250. 
1874. Ascidia Manhattensis TeUkampf, Ann. Lyceum Nat. Hist. N. Y., vol. 
10, p. 83-91, pi. 3. 
1879. Molgula Manhattensis Verrill, Preliminary Check-Hst of Marine 
Invertebrates, p. 27. 
1879. Molgula Manhattensis Verrill and Rathbun, Proc. U. S. Nat. Mus., 
vol. 2, p. 231. 
1882. Molgula manhattensis Kingsley, Proc. Boston Soc. Nat. Hist., vol. 21, 
p. 441-451, pi. 9. (Development.) 
1889. Molgula Manhattensis McDonald, Rept. U. S. Comm. Fish and Fish- 
eries for 1886, p. 858. 
