[107] CEPHALOPODS OF NORTHEASTERN COAST OF AMERICA. 
* 
Sthenoteuthis pteropus Verrill. 
Ommastrephes pteropus? Steenstrup (MSS., 1858). 
Tryon, Man. Conch., i, p. 179 (no description). 
_ Sthenoteuthis pteropus Verrill, Trans. Conn. Acad., vol. v, p. 228, pl. 27, fig. 
7, 7a, pl. 36, figs. 5-9, Feb., 1880; Amer. Journ. Sci., vol. xix, p. 289, Apr., 
1880. 
Ommatostrephes pteropus Steenstrup, Oversigt K. Danske Vidensk. Selsk. For- 
handl., 1880 (received Aug. ), pp. 76-81, fig. 7, p. 79, fig. 2, p. 81 (details). 
Plate VII, figure 2. Plate XVII, figures 3-9. 
A large squid, 74.8°™" (29.5 inches) long from tail to tip of longest sessile 
arms, Similar in size and form to the preceding, and closely allied to it, 
has been sent to me by Mr. G. Brown Goode, who obtained it at Ber- 
muda. It is probably the Ommatostrephes pteropus of Steenstrup. 
The body is stout, acuminate posteriorly; the anterior border of the 
mantle, beneath, is even, and not distinctly emarginate in the middle. 
The caudal fin is large, broad, transversely rhomboidal, but neither 
so broad nor so large proportionally as in 8. megaptera. The siphon is 
very large and broad (63™™ long by 50™" broad), with a large aperture, 
25™™ wide. The eyeballs are very large, elongated, measuring, although 
somewhat collapsed, about 42" long by 31™™ broad. The eye-openings, 
as distended, are large, oblong, elliptical, with a broad sinus and slightly 
thickened edges. 
The arms are stout and rather long, the third and ventral pairs being 
nearly equal in length; those of the second pair are about 12.5™" shorter 
than those of the third; the dorsal ones about 63"™ shorter than those 
of the second; the dorsal arms are 18.4™ long, trapezoidal in form, 
the outer face convex and about 1.9™ broad; the lateral and inner faces, 
1.2°™; along the inner angles there is a narrow membrane, outside 
the suckers (fig. 7, a). Those of the second pair are 24.7™ in length; 
their transverse breadth is about 2°"; from inner face to outer angle, 
1.9™; along the outer angle, in these, is a thick, acute-edged crest, 
widest in the middle of the arm; along the lower inner angle, outside 
the suckers, there is a broad and very thin membrane, 2.5°™ or more in 
width (fig. 7, b); along the upper inner angle is a similar membrane, 
about .6" ae 
The arms of the third pair are 26" long (31° from center of eye to 
tip of arms); they are compressed, 2.25°" broad at base; on the outer 
angle, along the middle, there is a very prominent crest (fig. 7, c), so 
that, in this part, the distance from inner face to outer angle is 4°"; 
along the lower inner angle there is a very broad, thin, delicate os. 
where widest at least 5°™ to 7°™ (2 to 2.75 inches) de: it is Conailet: 
ably torn and may have been still Haft it is widest beyond the middle 
of the arm; on the upper inner angle the corresponding yembrane is 
about 0.6°™ wide (fig. 7, c). Transverse, thick, fleshy ridges run out 
from between the suckers a short distance on these membranes, and then 
fade out. The ventral arms are 2.25 broad at base and trapezoidal ; 
