A. E. Verrill — North American Cephalopods. 
383 
the middle, narrowed bat little forward, but decidedly tapered, back of 
the fins, to the flat, obtuse, or subtruncate tail. The sides of the 
head and of the bod} 7 , forward of the fins, are bordered by a thin 
soft membrane, about 12 mm wide. The fins are elongated, sub-tri- 
angular, obtusely pointed, placed in advance of the middle of the 
body ; supported by internal cartilages, which unite with a trans- 
verse dorsal Y-shaped one, situated behind the fins. Siphon elonga- 
ted (about 12 mra ), slender, round, with a small terminal opening. 
Mantle edge is contracted and thickened around the base of the siphon 
so as to show only a very small opening, and is united to its ante- 
rior or dorsal commissural band. Eyes large, distinctly visible 
through the integument. Arms long, slender, sub-equal, each united 
to the great web by a broad membrane developed on its outer side, 
widest (about 38 mra or T5 inches) in the middle of the arm, while the 
edge of the web unites directly to the sides of the arms and runs 
along the free portion toward the very slender tip, as a border. 
This arrangement gives a swollen or campanulate form to the 
extended web. Edges of the web incurved between the arms, widest 
between the two lateral pairs of arms. The arms bear each fifty- 
five or more suckers, in a single row. Those in the middle region 
are wide-apart (12 mm or more), with a pair of slender, thread-like 
cirri, about 25 to 32 lum long, midway between them. The cirri com- 
mence, in a rudimentary form, between the 5th and 6th suckers, on 
the dorsal arms, and between the 7th and 8th, on the lateral and 
ventral ones. They cease before the 23d sucker on the dorsal and 
lateral arms, and before the 22d on the ventral ones, which bear each 
14 pairs of cirri. Near the mouth, and beyond the last cirri, on the free 
portion of the arms, the suckers are more closely arranged. The jaws 
are small, with a deep cavity. Beyond the last cirri, on the dorsal 
arms, there are 33 to 35 small suckers. The 2d arm on the right 
side appears to be imperfect. On this arm there are but 19 suckers 
beyond the last cirri ; then follow minute, wart-like tubercles, extend- 
ing to the tij). Color, in alcohol, generally pale with irregular mot* 
tlings and streaks of dull brownish ; inner surface of arms and web, 
toward the base, and membrane around the mouth, deep purplish 
brown. Length from end of body to base of arms, 160"""; length 
to posterior base of fins, 63 mm ; to anterior base, 101 n,m ; width across 
fins, 126"""; in advance of fins, 53""" (not including lateral mem- 
brane) ; across eyes, 44""" ; across end of tail, 30""" ; diameter of 
eye, 25""" ; width of fins, at base, 33""" ; their length, 44""" ; length 
of arms, 330""" to 355""" ; portion beyond web, 63 to 76""". Edge 
of extended web, between upper arms, about 101""" ; between lateral 
