VAX NAME: COMPOUXD ASCIDIANS. 375 
190S. LeplocUnides faeroensis Bjorkan, Tromsoe Mus. Aarsheft., no. 25, p. 99. 
1909. Leptoclinides faeroensis Hartmeyer, Bronn's Tier-reich, vol. 3, suppl., 
p. 1447. 
This is exclusively a deep-water species, and aside from the differ- 
ences in the characters of the zooids, is readily distinguished from 
Didcmmim [Leptoclinum] lufariuni by the larger spicules with longer 
and usually more numerous points, the larger and fewer zooids, and 
by the great thickness of the colony, the surface of which is generally 
raised into low elevations and folds of irregular form and considerable 
extent. In a specimen measuring about So mm. across, the thickness 
is no less than 25 mm. at one point. The interior of the colony is 
occupied by test substance of firm consistency and yellow color, con- 
taining scattered spicules, the zooids occupying the portions near the 
surface only. The surface layer of test above the zooids and cloacal 
chambers contains more numerous spicules, and may readily be stripped 
off. 
In its character the surface of the colony is very variable. The 
apertures of both kinds are conspicuous, and the surface is often 
slightly raised over the 
position of each zooid. 
The suri'ace of the colony 
is a dull yellowish white 
color in the alcoholic speci- 
mens. The spicules are 
rather large, usually with 
long regular conical points. Text-fig. 10.~ Leptoclinides faeroensis Bjerkan. 
Thev are USUalh- not much typical spicules from a colony from Station 2429 
.• . (off Newfoundland, N. lat. 42° 55' .30", W. long. 
over 0.05 mm. in diameter, 50° 5i', 471 fathoms), x 5i5. 
and in some specimens 
they are beautifully regular in the surface layer of test. 
The zooids of this species are large, the individual figured, which is 
well exi^anded, measuring 1.7 mm. long. The body is greatly con- 
stricted or strangulated between the thorax and abdomen. The 
mantle musculature consists of a number of narrow longitudinal 
bands, beneath which on the thorax are also many transverse fibers. 
Xo muscular process extending out into the test was observed, but 
club-shaped vascular processes resembling those of Lissoclinum 
aureum, described below, are frequently present. 
The branchial orifice has six short lobes; the atrial orifice is at the 
