

[89] CEPHALOPODS OF NORTHEASTERN COAST OF AMERICA. 299 



to ventral notch of gular lamina?, 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, fig. 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 i3 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 



