VAN NAME: SIMPLE ASCIDIANS. 555 
specimens coming from rather deep water (62 to 202 fathoms, in one 
case 397 fathoms) far to the southward of the coasts of soutliern New 
England. In many of these stations it grows in large clusters or 
masses and was dredged in considerable quantities, so that it is evi- 
dently an exceedingly abundant species. It occurs on both sandy 
and muddy bottoms, but prefers compact sand and gravel. The 
following are the localities of the specimens examined : 
Station 1157 (N. lat. 40° 14', W. long. 70° 29' 15", 62 fathoms, soft mud), 
small specimens. 
Station 950 (N. lat. 40° 07', W. long. 70° 32', 71 fathoms, sand, shells and 
mud), small specimens. 
Station 872 (N. lat. 40° 05' 39", W. long. 70° 23' 52", 86 fathoms, sand, gravel, 
shells and* sponge), large specimens. 
Stations 865-867 (N. lat. 40° 05', W. long. 70° 22', 64-65 fathoms, sand, mud 
and shells), many specimens. 
Station 949 (N. lat. 40° 03', W. long. 70° 31', 100 fathoms, yellow mud), 
many specimens. 
Station 871 (N. lat. 40° 02' 54", W. long. 70° 23' 40", 115 fathoms, mud and 
fine sand), many rather small specimens. 
Station 1117 (N. lat. 40° 02', W. long. 70° 45', 89 fathoms, fine sand), many 
specimens. 
Station 1110 (N. lat. 40° 02', W. long. 70° 35', 100 fathoms, green mud and 
fine sand), many specimens. 
Station 874 (N. lat. 40° 00', W. long. 70° 57', 100 fathoms, soft sticky mud), 
small specimens. 
Station 1030 (N. lat. 39° 58' 30", W. long. 69° 15', 337 fathoms, yellow mud), 
rather small specimens. 
Station 1039 (N. lat. 39° 59', W. long. 70° 06', 130 fathoms, sand and mud, 
shells), one rather large specimen. 
Station 1038 (N. lat. 39° 58', W. long. 70° 06', 146 fathoms, sand and shells), 
one specimen. 
Station 1092 (N. lat. 39° 58', W. long. 69° 42', 202 fathoms, gray sand), 
small specimen. 
Station 940 (N. lat. 39° 54', W. long. 69° 51' 30", 134 fathoms, hard sand and 
sponges), many specimens. 
Station 1097 (N. lat. 39° 54', W. long. 69° 44', 158 fathoms, fine sand). 
Station 1046 (N. lat. 38° 33', W. long. 73° 18', 104 fathoms, sand), small 
specimens. 
Verrill (1885a, p. 529) refers to this species but considers it prob- 
ably identical with Tethyum partitum (Stimpson). 
