418 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 mm ; greatest breadth, 7 mm ; of shaft, 2.5 mm ; 

 length of cone, on shortest side, 7 mra . 



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 ram (10.25 inches) ; length of mantle, 153 mm 

 (6 inches); length of dorsal arms, 57 mm ; of 2d pair, 71 mm ; of 3d pair, 

 77 mm ; of 4th pair, 70 mm ; of tentacular arms, 100 mm ; length of fin, 

 from insertion, 63 mm ; from anterior lobe, 70 mm ; greatest breadth, 68 mm , 

 breadth of head, 29 mm . 



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 vense-cavse. The first stomach is rounded and the second 

 stomach is a large, long-pyriform sac; the intestine is long; the ink-sac 

 is Ion g-pyrif orin. 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 mm , diameters 2 mm and 4 mm ), 

 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 crecal lobe of the stomach. The prostate gland, vesiculae- 

 seminales and spermatophore-sac are small; the efferent duct is long 

 and slender, extending forward over and beyond the base of the left 

 gill. 



