REPORT OF COMMISSIONER OF FISH AND FISHERIES. [208] 
width to the widest part; when they still more gradually decrease pos- 
teriorly; but toward the end they expand into the obliquely hooded 
portion, or terminal hollow cone; this portion is strengthened by a dor- 
sal mid-rib, and by numerous small ribs which radiate forward from the 
tip, one on each side being stronger than the rest. In life, the cone 
contained part of the testicle, and at the tip a cartilaginous core. 
Length of pen, in alcohol, 133™™; greatest breadth, 7™™; of shaft, 2.5™™; 
length of cone, on shortest side, 7™™. 
General color of body, fins, head and arms, deep reddish brown, 
tinged with purple; back darkest; the color is due to large chromato- 
phores rather uniformly and closely scattered over the whole surface; 
on the arms and siphon they are smaller, but they cover all the surfaces 
of the arms, except the lower side of the tentacular arms and the face 
of the club. Total length, 263™™ (10.25 inches); length of mantle, 153™™ 
(6 inches); length of dorsal arms, 57™™ ;. of 2d pair, 71™™; of 3d pair, 
77; of 4th pair, 70™™; of tentacular arms, 1007"; length of fin, 
from insertion, 63"™; from anterior lobe, 70™™; greatest breadth, 68™™, 
breadth of head, 29™™. - . 
Notes on the visceral anatomy of the male. 
In its anatomy this species resembles Ommastrephes. The branchial 
cavity is very large, extending back nearly to the base of the fin; the 
median longitudinal septum is far back, gills very long, but not reach- 
ing the margin of the mantle, attached nearly to the tip; its structure 
is like that of Ommastrephes. Liver orange-brown, very large, massive,. 
nearly as in Ommastrephes, but larger, extending back farther than the: 
base of the fin. The circulatory and renal systems are similar to those 
of Ommastrephes, in most respects. The posterior aorta goes back some: 
distance before it divides, about opposite the base of the fin, into the 
medio-ventral artery of the mantle, and a caudal artery. Two large 
ventral renal organs lie below. and to each side of the heart, and blend 
together, in front of it, into a large mass, which has a pointed lobe 
extending forward; posteriorly two lobes extend back, as usual, along 
the posterior vene-cave. The first stomach is rounded and the second 
stomach is a large, long-pyriform sac; the intestine is long; the ink-sac 
is long-pyriform. The reproductive organs are small, indicating that 
- the specimen is still immature, and probably only one year old. The 
spermary or “testicle” is small (length 18™™, diameters 2™™ and 4™™), 
flattened, tapering backward, partly inclosed by the hooded portion of 
the pen, and with the anterior end attached laterally to the posterior 
end of the cecal lobe of the stomach. The prostate gland, vesiculz- 
seminales and spermatophore-sac are small; the efferent duct is long 
and slender, extending forward over and® beyond the base of the left 
gill. 
