A. E. Verrill — North American Cephalopods. 
415 
origin of the fins, is lanceolate, with two faint, close ribs along the 
middle, and less distinct parallel lines each side of these; the tip is 
an acute hollow cone, about 10 mm long. 
Color of mantle, pale yellowish white, translucent, with scattered, 
conspicuous, round, or more or less elliptical, purplish brown spots, 2 
to 3 mra in diameter, and 5 to 1 0 mm apart. Eyes dark purplish or 
chocolate-brown ; head, siphon, and outer surfaces of arms thinly 
specked with purplish brown cliromatophores. 
The length of the largest specimen is 163 mm , from end of tail to tip 
of 3d pair of arms; length of mantle, dorsally, 116 mm ; mantle to 
base of dorsal arms, n mm ; diameter of eyes, l7 ram ; breadth of head 
across eyes, 30 mm ; breadth of body, 26 mtn ; length of caudal fin, 45 mm ; 
its breadth, 28 nim ; length of dorsal arms, 20 mm ; of 2d pair, 25 llim ; of 
3d pair, 32 ,nm ; of 4th pair, 20 mni ; of tentacular arms, 35 mm ; of club, 
ll n,ra ; breadth of lateral arms, at base, 3.5 mm ; diameter of largest 
suckers, 2 "o' 111 ™. 
The teeth of the odontopbore (PI. LY, fig. 2 a) form seven rows, 
as usual ; the median teeth have a very large and long median den- 
ticle and a small one at each lateral angle; the inner lateral teeth 
have a large inner denticle and a very small outer one; the two outer 
rows are rather stout; there is also a marginal row of small, more or 
less elliptical plates, with their outlines rather indefinite. 
Off Martha’s Vineyard, 87^ miles from Gay Head, station 952, in 
388 fathoms. U. S. Fish Commission, Aug. 4, 1881. 
This species resembles Taonius pavo (for which I at first mistook 
it) in form, but is very different in color and other characters. The 
suckers, which are remarkably flat in T. pavo , and strongly serrate, 
are in this very deep, and the edge of the ring is generally entire. 
The pen is also different. 
Notes on the visceral anatomy. 
Anatomically, this species closely resembles Eesmoteuthis hyper- 
borea. (See PI. XXXIX, fig. 1.) It has a similar short, thick, com- 
pressed, ovate liver, with the intestine in a groove along its ventral 
edge, and the small ink-sac imbedded in its antero-ventral surface. 
The gills are laterally placed, short, with long lamellae. The heart 
is small, irregularly tubular, oblique, with four angles or lobes where 
joined by the principal vessels. The efferent vessels from the gills 
are long and conspicuous, because the bases of the gills are distant 
from the heart. The alimentary tract consists of a short, narrow 
rectum, attached to the liver, and ending in a bilabiate aperture, 
