118 BULLETIN OF THE 
tapered. The arms are, in normal specimens, subequal in size, very long, not 
very stout at base, and very slender toward the tip ; the two lateral pairs are 
nearly equal, and a little longer than the dorsal ones ; the ventral arms are 
slightly smaller at base than the others, and about equal in length to the dor- 
sals, or sometimes slightly shorter. The web between the arms is broad and 
thin ; it is widest between the lateral arms, where it is nearly one fourth as 
wide as the arms are long, and narrowest between the ventral ones ; between 
the dorsal arms it is nearly as wide as between the laterals. The web extends 
as a lateral membrane along the sides of all the arms, but it is widest and 
extends farthest along the posterior margin of the dorsal and lateral arms and 
along the anterior margin of the ventrals. Along these margins the membrane 
can be traced nearly to the ends of the arms. On the anterior sides of the 
dorsal arms, and on the posterior margins of the ventral ones, the web rapidly 
narrows, and does not run very far out as a distinct fold, recognizable in pre- 
served specimens. The sucker-bearing face of the arms is not very broad, the 
breadth of the arms being usually less than the depth, toward the base. The 
arms are stoutest about opposite the edge of the web, the portion nearer the 
mouth gradually narrowing. The suckers nearest the mouth are small and 
elevated, not very close together, alternating, but not standing far out of the 
median line ; they gradually increase in size, to about the sixteenth or eight- 
eenth, which are within the border of the web, where they attain their full size ; 
the largest-sized suckers, in the male, continue for some distance beyond the 
edge of the intermediate web without much change in size; they are of nearly 
equal size on the three upper pairs of arms, but somewhat smaller on the ven- 
tral ones. Farther out the suckers very gradually diminish in size, becoming 
very small and very numerous toward the tips. The larger suckers are broad 
and moderately elevated, with a wide rim and a deep, crenulated central pit, 
from which strongly marked grooves radiate to the rim. The largest suckers 
have from 30 to 35 primary grooves that reach the margin of the central pit ; 
many of these fork once, or even twice, toward the outer margin. The beak 
is strong and black. 
The two large males examined have the third right arm hectocotylized, but 
not very conspicuously so. A well-marked membranous fold, of moderate 
breadth, runs from the web along the posterior edge of the arm nearly to the 
tip ; its inner surface is white and smooth, and naturally curls inward, thus 
forming a groove, which, at a small, acute, conical papilla, situated at the base 
of the terminal organ, passes into the furrow of the latter. This organ is rela- 
tively small, narrow, rather long, tapering to the tip ; its inner surface is flat- 
tened or concave, forming a groove where the margins are incurved. In the 
best preserved specimens the groove is covered internally, especially near its 
base, with small, soft, granule-like warts, or papille, in about six longitudinal 
rows, but there are no distinct transverse partitions. The hectocotylized arm, 
in one of the specimens, had 107 suckers, the distal ones being very small. 
The general color of preserved specimens is, as in most species, dull purplish 
or dark brown on the upper and outer surfaces, paler and more yellowish on 
