[107] CEPHALOPODS OF NORTHEASTERN COAST OF AMERICA. 317 



Sthenoteuthis pteropus Verrill. 



Ommastrephes pteropust Steenstrup (MSS., 1858). 

 Tryon, Mati. Couch., i, p. 179 (no description). 

 Sthenoteuthis pteropus Verrill, Traus. Conn. Acad., vol. v, p. 228, pi. 27, fig. 



7, 7 a, pi. 36, figs. 5-9, Feb., 1880; Amer. Journ. Sci., vol. xix, p. 289, Apr., 



1880'. 

 Ommatostreplies 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 cm (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. Gr. Brown Goode, who obtained it at Ber- 

 muda. It is probably the Ommatostreplies 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 mm long by 50 mm broad), with a large aperture, 

 25 mm wide. The eyeballs are very large, elongated, measuring, although 

 somewhat collapsed, about 42 mm long by 31 mm 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 mm shorter 

 than those of the third ; the dorsal ones about G3 mm shorter than those 

 of the second ; the dorsal arms are 18.4 cm long, trapezoidal in form, 

 the outer face convex and about 1.9 cm broad ; the lateral and inner faces, 

 1.2 cm ; along the inner angles there is a narrow membrane, outside 

 the suckers (fig. 7, a). Those of the second pair are 24.7 cm in length j 

 their transverse breadth is about 2 0m ; from inner face to outer angle, 

 1.9 cm ; 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 cm or more in 

 width (fig. 7, 6) ; along the upper inner angle is a similar membrane, 

 about .6 cm wide. 



The arms of the third pair are 26 cm long (31 cm from center of eye to 

 tip of arms) ; they are compressed, 2.25 cm broad at base j 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 cm ; 

 along the lower inner angle there is a very broad, thin, delicate web, 

 where widest at least 5 cm to 7 cm (2 to 2.75 inches) wide; it is consider- 

 ably torn and may have been still wider ; it is widest beyond the middle 

 of the arm ; on the upper inner angle the corresponding membrane is 

 about 0.6 cm 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 cm broad at base and trapezoidal ; 



