REPORT OF COMMISSIONER OF FISH AND FISHERIES. [218] 
Tentacular arms (Pl. XLVI, fig. 3), rather stout, tapering from the 
thickened base, and in our specimens, equalling in size, and not much 
longer than, those of the third pair; club well developed, rather broader 
than the rest of the arm, with a dorsal keel and wide, marginal, protec- 
tive membranes; the suckers are arranged in four regular rows; the 
larger suckers are about equal in size to the larger ones of the dorsal 
arms; of these there are eight or nine in each row, the marginal ones are 
scarcely smaller than the median ones and similar in shape, but more 
oblique, all there suckers are cup-shaped, obliquely attached, with long 
pedicels; the marginal ring is denticulated all around, the teeth ou the 
outer or higher side being slender, sharp, and incurved; those on the in- 
ner side minute. The distal part of the club is short, and covered with 
four rows of small suckers, similar to the larger ones in shape and arma- 
ture; at the tip is a small group of minute suckers, apparently unarmed. 
At the proximal end of the club there is a group of small denticulated 
suckers, and four irregular rows of minute, connective suckers, attached 
by short pedicels, extend along the inner surface of the arm to the mid- 
dle or beyond; these are interspersed with minute tubercles, more dis- 
tinct distally, near the club. The outer buccal membrane is narrow, 
without distinct angles. 
The pen is very thin, pale yellow; the anterior portion is narrow and 
slender; the posterior portion, commencing opposite the origin of the 
fins, is lanceolate, with two faint, close ribs along the middle, and less 
distinct parallel lines each side of these; the tip is a hollow cone, about 
10™™ long. 
The teeth of the odontophore (Pl. XLV, fig. 2 a) form seven rows; the 
median teeth have a very large and long median denticle, and a small 
lateral one on each angle; the inner lateral teeth have a large inner and 
a very small outer denticle; the two outer rows of teeth are rather 
stout; a marginal row of rather ill-defined elliptical plates on each side. 
Color of mantle pale yellowish white, with scattered, conspicuous, 
round, or more or less elliptical, purplish-brown spots, 2 to 3™™ in diam- 
eter, and 5 to 10™" apart. Eyes dark purplish or chocolate-brown; 
head, siphon, and outer surfaces of arms thickly specked with purplish 
brown chromatophores. 
The length of the largest specimen is 163", from end of tail to tip of 
third pair of arms; length of mantle dorsally, 116"™; mantle to base of 
dorsal arms, 11™™; diameter of eyes, 17™™; breadth of head across 
eyes, 30™"; breadth of body, 26™™; length of caudal fin, 45™™; its 
breadth, 28"; length of dorsal arms, 20"; of second pair, 25™™; of 
third pair, 82™™; of fourth pair, 20™™; of tentacular arms, 35™™; of club, 
11™; breadth of lateral arms, at base, 3.5™™; diameter of largest 
suckers, 2. 5™™. 
Off Martha’s Vineyard, 874 miles from Gay Head, station 952, in 388 
fathoms. U.S. Fish Commsssion, Aug. 4, 1881. 
