[89] CEPHALOPODS OF NORTHEASTERN COAST OF AMERICA. 
to ventral notch of gular laminae, 9 mm ; to posterior end of same, 16 mm ; 
to base of cutting edges, 5 mm . 
The buccal mass has, on the outer surface of the dorsal and lateral 
sides, a broad, thin, brown horny plate, with a notch posteriorly, in the 
median line. 
The odontophore (Plate XIX, tig. 3) is remarkable for the length 
and sharpness of the teeth, especially of the central and outer rows. 
The median teeth (a) have a long and very acute median denticle, with 
much shorter lateral ones. The inner lateral teeth (b) have broad bases 
and a long and very sharp central denticle, with a much shorter lateral 
one on the outside. The next to the outer lateral teeth ( c ) are sim¬ 
ple, slender, and sharp. The outer lateral* teeth (d) are much longer, 
strongly curved, and very acute. 
The pen (Plate XVIII, fig. 4) is long and slender, with a slender mid¬ 
rib and strong marginal ribs; the anterior end is thin, broad pen-shaped, 
subacute ; from very near the anterior end it tapers gradually backward 
to about the posterior fourth, where it becomes very narrow, apparently 
consisting only of the consolidated lateral ribs and midrib, the former 
showing on the ventral side a thin groove between them, the latter ap¬ 
pearing as a slender ridge on the dorsal side. The posterior portion is 
narrow-lanceolate in form, with thin edges and a strong midrib, com¬ 
posed of the united marginal ribs of the anterior portion; the thin 
edges are incurved, so as to give a canoe-shaped form to this portion, 
and near the tip the edges unite beneath into a short, hood-like tip. 
Anteriorly the lateral ribs show two grooves on the ventral side, and 
appear to be composed of three united ribs. 
The ground-color of a specimen taken by me in 1870 at Eastport, 
Me., when first caught, was pale bluish white, with green, blue, and 
yellow iridescence on the sides and lower surface; the whole body, 
head, and outer surfaces of arms and fins were more or less thickly 
covered with small, unequal, circular, orange-brown and dark brown 
spots, having crenulate margins; these spots were continually chang¬ 
ing in size, from mere points, when they were nearly black, to spots 
l mm to 1.5 mm in diameter, when they were pale orange-brown, becoming 
lighter colored as they expanded. On the lower side of body, head, 
and siphon the spots were more scattered, but the intervals were gen¬ 
erally less than the diameter of the spots. On the upper side the spots 
were much crowded and in different planes, with the edges often over¬ 
lapping, thus increasing the variety of the tints. Along the middle of 
the back the ground-color was pale flesh-color, with a distinct median 
dorsal band, along which the spots were more crowded and tinged with 
green in fine specks. Above each eye there was a broad lunate spot of 
light purplish red, with smaller and much crowded brown spots. The 
upper surface of the head was deeply colored by the brown spots, which 
were here larger, darker, and more crowded than elsewhere, and situ¬ 
ated in several strata. The under sides of the arms and fins were 
colored like the body, except that the spots were smaller and much less 
