264 
A. E. Verrill — North American Cephalopods. 
suckers diminish regularly in size, and in the number of denticles, 
till at the 200th (where the arms are broken off") there are but three 
denticles. 
Ten tacular-arms. 
Plate XXYI, tig. 2. 
The tentacular-arms are both entire, with all the suckers well pre- 
served. The total length is 65 and 67 inches respectively ; length of 
the expanded portion or club, 8-25 inches; diameter of the peduncu- 
lar portion varies from - 40to '70 of an inch ; at the base, ’90 ; breadth 
of the proximal part of the club, where it is broadest, ’70; diameter 
from front to back, ’60; external diameter of the largest suckers, 
•65 of an inch; height of their cups, ’28; of lateral suckers, T8 ; of 
the largest marginal suckers on the distal portion, -14. 
The peduncular portion is somewhat thickened and rounded at the 
base, but through most of its length it is slender, varying in size, and 
nearly triangular in section, with the corners rounded, each side 
measuring, where largest, '60 of an inch in breadth. At about a foot 
from the base the small smooth-rimmed suckers and their opposing 
tubercles begin to appear on the inner surface. At first these are 
placed singly and at considerable intervals (2*5 to 3 - 5 inches), each 
sucker alternating with a tubercle on each arm ; further out they 
are nearer together, and towards the club they alternate, two by two, 
on each arm ; near the commencement of the club they become more 
numerous and are arranged somewhat in two rows ; just at the 
commencement of the club they become more crowded, forming 
three and then four oblique transverse rows of suckers, with the same 
number of tubercles alongside of them ; on the basal expansion 
of the club, which is its thickest portion, these suckers and tubercles 
become very numerous, covering nearly the whole inner surface, form- 
ing rather crowded and irregular oblique rows of six or more. These 
smooth-rimmed suckers are followed by an irregular group of about 
twenty, somewhat larger, denticulated suckers, occupying the entire 
breadth for a very short distance. Then follow the two median 
rows of large suckers, alternating with a row of marginal ones, of 
about half their size, on each side. The first three or four large 
suckers of each row gradually increase in size ; then follow six to 
eight nearly equal ones of the largest size ; these are followed by 
two to four distal ones, decreasing in size. In one of the rows there 
are fourteen that distinctly belong to the large series ; in the other 
row there are twelve. The distal section of the club is occupied by 
