[35] CEPHALOPODS OF NORTHEASTERN COAST OF AMERICA. 
April, 1880, by Capt. O. A. Whitten and crew of the schooner “Wm. 
H. Oakes,” by whom it was presented to the United States Commission 
of Fish and Fisheries. It furnishes the means of completing the 
description of parts that were lacking or badly preserved in the larger 
specimens described above, and especially of the sessile arms and the 
buccal membranes (Plate VI). 
The color of the head, so far as preserved, and of the external sur- 
faces of the sessile arms, is a rather dark purplish brown, due to minute 
crowded specks of that color, thickly distributed, with a pinkish white 
ground-color between them. The outer buccal membrane is darker; 
the inner surfaces of the arms are whitish; the peduncular portions of 
the tentacular arms have fewer color specks, and are paler than the 
other arms. 
This creature had been badly mutilated, as described on p. 18, long 
before its death, as its healed wounds show, and to this circumstance 
many of the imperfections of the specimen are due. 
Sessile arms. 
With the exception of the left arm of the second pair, none of the 
sessile arms have their tips perfect. Therefore, it is not possible to give 
their relative lengths. 
The dorsal arms are the smallest at base, and the third pair largest. 
They are ali provided with a rather narrow marginal membrane along 
each border of the front side. These membranes are scarcely wide 
enough to reach to the level of the rims of the suckers, though they may 
have doneso in life. Thefront margin, bearing the suckers, isnarrow onall 
the arms, but relatively wider on the ventrals than on any of the others. 
Each sucker-pedicel arises from ‘a muscular cushion that is slightly 
raised and rounded on the inner side; these, alternating on the two 
sides, leave-a zigzag depression along the middle of the arm; from each 
of these cushions two thickened muscular ridges run outward to the 
edge of the lateral membranes, one on each side of the pedicels of the 
suckers. These transverse muscular ridges give a scalloped outline to 
the margin of the membranes. These marginal membranes are nar- 
rowest and the suckers are smallest on the ventral arms. The dorsal 
and lateral arms are strongly compressed laterally, but slightly swollen 
or convex in the middle, and narrowed externally to a carina, which is 
most prominent along the middle of the arms, and most conspicuous on 
the third pair of arms. The dorsal arms are rather more slender than 
the second pair, and were probably somewhat shorter. 
The left arm of the second pair has the tip preserved, with all its 
suckers present. On this arm there are 330 suckers in all. The total 
length of the arm is 26.25 inches. The first 50 suckers extend to 12.25 
inches from the base; the next 50 occupy 4.5 inches; the next 50 cover 3.5 
inches; the next 100 occupy 4.25 inches; the last 80 occupy 1.75 inches. 
This arm is .80 of an inch in transverse diameter near the base; 1.20 
