A. M. VerriU — North American Cephalopods. 
369 
Arms subequal, relatively short, stout, tapering to slender points, 
connected for about one-third of their length by a web, which ex- 
tends as a narrow membrane along their margins to near the ends. 
Suckers small, not crowded, alternating pretty regularly in two rows ; 
in the original type-specimen, which was not full grown, the arms of 
the first pair each had about sixty-five suckers; those of the fourth 
pair about sixty. In a large example (?) the dorsal arms have 
about 94; third pair about 100; fourth pair about 90. 
In the male, the right arm of the third pair has its terminal portion, 
for about a third of its entire length, modified for reproductive pur- 
poses into a large spoon-shaped organ (Plate XXXIII. figs. 1. la. A), 
broadly elliptical in outline, with the sides incurved and the end 
somewhat tri-lobed ; its interior deeply concave with ten to twelve, and 
occasionally, in the largest examples, thirteen, elevated transverse 
folds; at the base, there is a fold bent into an acute angle, the 
apex directed forward, leaving a deep V-shaped sinus behind it, which 
is a continuation of a shallow groove formed by a thickening of the web 
along the lower side of the arm, and terminating midway between it 
and the fourth arm. At the end, this arm terminates in a small conical 
tip, between the two broadly rounded lobes of the spoon-shaped 
organ; at the base of this organ there is a slight constriction; the 
basal portion of the arm bears 30 to 37 suckers, like those on the other 
arms. The modified portion of the arm is considerably longer than 
the distance between the constriction at its base and the interbrachial 
web, and about equal to one-half the total length of the part which 
bears suckers. The corresponding arm on the left side is of the ordi- 
nary form and has, in a medium sized example, abo\it fifty-one suckers. 
The female differs but little from the male, externally, except in lack- 
ing the modification of the third right arm. 
Length of the original male specimen, in alcohol, exclusive of the 
arms, 44™'“; breadth of the body, 3T ; between eyes, 18^ ; length of 
the arms, of the first pair, from mouth, 18 nmi ; from mouth to edge of the 
web, 57 mr ; length of modified portion of third right arm, 18 ; breadth 
of this organ when expanded, ll*5 m “. Subsequently somewhat lar- 
ger specimens, both male and female, have been taken. 
One of the largest males (Station 878) measures from tip of dorsal 
arms to end of body, 163 !,,m ; from edge of dorsal web to end of 
body, 75 mm ; from edge of mantle, beneath, to end of body, 38; 
breadth of body, 48; of head, 41; length of dorsal arms to beak, 
110; of second pair, 112; of third pair, 115; of fourth pair, 110; of 
hectocotylizcd arm, 85 ; length of terminal spoon, 33 ; its breadth, 
17. This specimen has thirteen transverse lamella* in the spoon. 
