MUSEUM OF COMPARATIVE ZOOLOGY. 109 
two alternating rows; the free portion is slender, rounded externally, and 
tapers to a slender tip ; on the distal half, the sucker-pedicels are long, very 
prominent, conical, larger than the suckers, and tapering toward the tip, which 
terminates in a minute conical sucker, without any constriction between it and 
the pedicel ; of these there are ten or more pairs on the lateral and ventral 
arms, and four or five pairs on the dorsal arms ; the length of the sucker-pedi- 
cels and suckers together is greater than the diameter of the arms; on the 
basal half of the arms the suckers are of the ordinary structure, as in Rossia ; 
they are small, with small apertures, oblong, obliquely attached, on short, 
slender pedicels, which are surrounded by submarginal swellings of the arm- 
surface. Of these normal suckers there are nine to ten pairs on the lateral 
and ventral arms ; of these two or three, at about the sixth or seventh pair, on 
the lateral arms, are distinctly larger than those before or beyond them. One 
or two of intermediate form connect the normal with the specialized suckers. 
The dorsal arms are united together along their inner surfaces, which turn 
toward each other, for some distance from the base by a thickened membranous 
fold, which forms a sort of pocket or sinus between the arms, probably for 
sexual purposes. Tentacular arms are long, slender, triquetral, tapering dis- 
tally; club small, curled, a little wider than the portion of the arm just below 
it, covered with numerous very minute suckers, arranged in many rows. 
Siphon relatively large and prominent, projecting forward in front of the 
bases of the ventral arms. 
Measurements of Nectoteuthis Pourtalesii. 
Length to tip of longest sessile arm, . . : - 24 mm. 
e dorsal edge of mantle, . ’ : \ je ep 
“_ ventral edge of mantle, . 2 i en alas 
ws bases of lateral arms, 3 ; E : ye 
Breadth of body (or head), . ck < , F = hae 
Diameter of eyeball, : ; : : atlh es Gane 
Longitudinal extent of fin, . . : 2 : she ame 
Breadth from base to outer edge, . : é : 6 
Length of its insertion, : ‘ : . : i) ee 
a dorsal arms, . , . : : : Gres 
second pair, . 3 : : : ; if tone 
¢.- . third pair, é : ‘ : , : 8.5 “ 
a ventral arms, . : , ; , 0 LO 
me tentacular arms, ‘ : , ‘ : a0; 
ee elub,.. . , ; P : ' : ee ety 
Color of the dorsal and lateral surfaces of alcoholic specimen dark reddish 
brown, due to a large number of chromatophores, which extend but a short 
distance beyond the bases of the fins ; sides of the head, above the eyes, darker 
brown ; ventral shield dark purplish brown, caused by great numbers of very 
minute chromatophores ; its margin is surrounded by a pale band; arms and 
