428 EEPORT OF COMMISSIONER OF FISH AND FISHERIES. [218] 



Tentacular arms (PI. XL VI, fig. 3j, 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 heel 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 thiu, 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 mm long. 



The teeth of the odontophore (PI. XLV, fig. 2 «) 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 mm in diam- 

 eter, and 5 to 10 mm 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 mm , from end of tail to tip of 

 third pair of arms; length of mantle dorsally, 116 mm ; mantle to base of 

 dorsal arms, ll mm ; diameter of eyes, 17 mm ; breadth of head across 

 eyes, 30 mm ; breadth of body, 2G mul ; length of caudal fin, 45 mm ; its 

 breadth, 28 mm ; length of dorsal arms, 20 mui ; of second pair, 25 mm ; of 

 third pair, 32 mm ; of fourth pair, 20 mm ; of tentacular arms, 35 mui ; of club, 

 ll mm ; breadth of lateral arms, at base, 3. 5 mm ; diameter of largest 

 suckers, 2. 5 mm . 



Off Martha's Vineyard, 87i miles from Gay Head, station 952, in 388 

 fathoms. U. S. Fish Commsssion, Aug. 4, 18S1. 



