A. E. Verrill — North American Cephalopoda. 
413 
The specimens are both males, but show no positive evidence of 
hectocotylization. The body is long, somewhat fusiform, slightly 
smaller in advance of the middle. The tissues are exceedingly thin, 
delicate, pale, and translucent, so that the pen and other organs can 
be seen through the mantle. Anteriorly the edge of the mantle is 
attached to the head, medially, by a muscular commissure, and there 
is no free edge (such as D’Orbigny figures in T. par o) at the narrow 
middle portion of this band. This commissure is broader within the 
mantle, and there is another large, oblique, muscular commissure, ex- 
tending forward to the edge of the mantle, on each side, extensively 
uniting the inner surface of the mantle to the sides of the siphon. 
These commissures leave only a rather narrow opening to the gill- 
cavity, on each side, and one small ventral one, and the interior ven- 
tral cavity is partitioned off from the lateral ones. 
The siphon is large, projecting forward between the lower sides of 
the large eyes; it has no valve in the ordinary place, but toward the 
base, on the dorsal side, there are two erect, rounded, ear-like flaps, 
each with a small papilla ( i '), and a rounded, valve-like, raised median 
fold and a central papilla (i) in front of them. (PI. LV, fig. 2d.) 
The caudal fin is comparatively small, narrow-ovate, tapering to a 
short, blunt posterior end, and with the anterior lobes narrowed and 
scarcely projecting beyond the insertions. The eyes are very large 
and prominent, occupying the whole of the sides of the head, wide 
apart dorsally, but nearly in contact beneath ; eye-lids thin, entire. 
Arms rounded, rather slender, tapering to slender tips; those of the 
third pair are much the longest, and like the second pair, bear along 
the distal half suckers much larger than the proximal ones; tips short, 
with few small suckers. The dorsal and ventral arms are about equal, 
and not much more than half as long as the third pair; they bear 
smaller suckers, in two rows, regularly decreasing distally. The sec- 
ond pair is intermediate in length between the 1st and 3d pairs, with 
two rows of larger suckers on the outer half, suddenly decreasing dis- 
tally, with minute ones close to the tip. The large suckers (fig. 2 b, c) 
on the second and third pairs of arms are much larger than the others, 
excellent condition, many kinds of free-swimming deep-sea animals, not otherwise 
obtainable, or if taken in the trawl, crushed by the great masses of fishes, echinoderms, 
actiniae, etc., usually taken in evory haul, in these waters. 
Among the things captured in the “trawl-wings” are not only several cephalopoda 
(including Alloposns, Lestotc'utkU , Rossia), but Cymbulia calceolus and other Pteropods; 
vast numbers of Sagitta, one of them bright orange-colored ; numerous species of 
Copepod Crustacea, some of them of great size ; Schizopods ; Salpm ; Acalephs, in- 
cluding one very remarkablo new form of Siphonophora. etc. 
