VAN NAME: COMPOUND ASCIDIANS 345 
Family Polycitoridae Michaelsen, 1904. 
4. Pnlycitor kukenthnli (Gott?ichal(lt). [Not recorded by Verrill] 
Off Newfoundland; Spitzbergen; Murman coast. 
From 15 to 395 meters. 
5. Holozoa clarata (Sars). [Not recorded by Verrill.] 
Off Newfoundland and Nova Scotia; New England coast north of, and 
off, Cape Cod; northern European waters. 
Shallow water to 150 fathoms. 
Family Dide.mxidae Verrill, 1871. 
6. Didemnum lutarium sp. nov. [Leptoclinum alhidum (part.) + L. luteolum 
(part.) Verrill.] 
New Hampshire to Long Island Sound, but local north of Cape Cod. 
Shallow water only. 
7. Leptoclinides faeroensis Bjerkan. [Not recorded by \^errill.] 
Off Newfoundland and the eastern United States, south to N. lat. 37°; 
vicinity of Iceland; Faroe Lslands; north of Norway. 
Deep water only; 100 to 1582 fathoms. 
8. Tetradidemniim albidum (Verrill). [Leptoclinum albidum (type) + L. 
luteolum (type) Verrill.] 
Davis Strait; Labrador; Banks of Newfoundland; New England coast, 
chiefly from Cape Cod northward, but locally south to off Martha's Vine- 
yard; northern waters of Europe. 
Low- water mark to 1 10 fathoms. 
9. Didemnopsis tenerum (Verrill). [Lissoclinum tenerum Verrill.] 
Banks of Newfoundland; New England coast north of, and off. Cape 
Cod. Didemnopsis variabile (Huitfeldt-Kaas). 1896, of northern European 
and Asiatic waters, is very prolial~)ly identical. 
From 10 to 75 fathoms. 
10. Lissoclinum aureum Verrill. 
Banks of Newfoundland, New England coast, chiefly north of Cape Cod, 
but south locally to off Martha's Vineyard. Diplosomoides dubium Hart- 
meyer, 1903, from the region of Spitzbergen, is a very close ally. 
Shallow water to 100 fathoms. 
Family Syxoicidae Hartmeyer, 1908. 
11. M acroclinum pomum (Sars). [Macroclinum crater Verrill.] 
Banks of Newfoundland; waters of northern Europe; near the Faroe 
Islands; near Iceland. 
Greatest depth, 75 fathoms. 
