322 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [112] 



Sthenoteuthis Bartramii Verrill. 



Loligo sagUtatus (pars) Lamarck, 1799; Aiiim. sans Vert., vol. vii, p. 665. 

 Loligo Bartramii Lesueur, Journ. Phil. Acad., I, vol. ii, p. 90, pi. 7, 1821. 



Blainville, Diet. Sci. Nat., vol. xxvii, p. 141, 1823. 

 Loligo sagUtatus Blainv., Diet. Sci. Nat., vol. xxvii, p. 140. 

 Ommastrephes BartramiiiyOvb., Voy. Ame"r. Mend., Moll., p. 55, 1838 (t. Gray); 

 Ceph. Ac<5tab., pi. 2, figs. 11-20; Hist. Cuba, Moll., p. 59. 

 Gray, Catal. Moll. Brit. Mus., Cephal. Antep., p. 62, 1849. 

 Verrill, Invert. Vineyard Sound, &c, p. 341 [635], 1874 (non Binney in Gould, 



Invert. Mass.). 

 Tryon, Man. Concb., vol. i, p. 180, pi. 80, figs. 361, 362 (after D'Orb.). 

 Sthenoteuthis Bartramii Verrill, Trans. Conn. Acad., vol. v, p. 223, Feb., 1880 ; 



p. 288, Jan., 1881; Amer. Journ. Sci., vol. xix, p. 289, Apr., 1880. 

 Ommatostrephes Bartramii Steeustrup, Oversigt K. Danske Vidensk. Selsk. For- 

 handl., 1880, p. 79, fig. 2, p. 81, fig. 3, p. 89; autb. sep. copy (received 

 Aug.), p. 9, fig. 2, p. 11, fig. 3, p. 19. 



Body cylindrical, elongated, slender, tapering but little in front of the 

 fin ; anterior edge of mantle with a very slight median dorsal angle. 

 Caudal fin short and transversely rhomboidal, with the outer angles 

 acute, posterior angle obtuse, and the front edges rounded and project- 

 ing forward beyond the insertion. Length of fin (from insertion) to its 

 breadth, as 1 : 2; length of fin to mantle, as 1 : 2.80, in a young female 

 specimen with the body 3.25 inches long. Head short, as broad as the 

 body; eye-opening angular, higher than long, with a narrow, oblique 

 sinus. Nuchal crests nearly as in O. illecebrosus, consisting of a low, 

 transverse, undulated ridge extending around both sides to the dorsal 

 line, and with three raised longitudinal crests on each side. Siphon 

 large, sunken in a deep pit ; anterior border of the pit with a series of 

 6 to 12 or more (varying with age) small and short furrows, which ex- 

 tend inward only a short distance from the edge. Arms rather short, 

 not very unequal ; the dorsal ones are a little the shortest and smallest; 

 the third pair are the longest, the second and fourth pairs are interme- 

 diate in length and nearly equal ; the arms of the second pair are fur- 

 nished with a well-developed membrane along the lower outer angle, 

 and with a thin marginal membrane of moderate width along the inner 

 angles, outside the suckers, that on the lower side extending beyond the 

 suckers. Those of the third pair are compressed, with a well-developed 

 membranous keel on the median outer edge, beyond the basal portion ; 

 on the lower inner angle there is a broad, thin, marginal membrane, ex- 

 tending beyond the suckers, and a narrow one on the upper side ; the 

 dorsal and ventral arms have narrow marginal membranes. Suckers of 

 the dorsal and lateral arms furnished with horny rings, which have the 

 edge divided into small, acute-triangular teeth, largest on the outer 

 side ; on the ventral arms the suckers are smaller, those on the x>rox- 

 imal half of the arm having smooth-edged rings, while those on the 

 distal portion are sharply toothed on the outer edge. Tentacular arms 

 slender and moderately elongated, with distinctly broader clubs, which 

 are keeled on the back side and furnished with a thin marginal mem- 

 brane on each edge. The suckers form two median alternating rows 



