[131] CEPHALOPODS OF NORTHEASTERN COAST OF AMERICA. 341 



stance to explain the cause of the brevity of the following description 

 [of 0. illecebrosus] taken from my drawing." The drawing was also in- 

 accurate for the same reason. 



MYOPSIDiE D'Orbiguy. 



Eyes without regular lids, the integument of the head extending con- 

 tinuously over the eye, and becoming transparent over the pupil of 

 the eye. In some genera (Rossia, &c.) there is a thickened fold of skin 

 below the eye, constituting a sort of false lower eyelid. Pupil crescent- 

 shaped. A small mucous pore in front of the anterior edge of the eye, 

 connected with the orbital cavity. 



Family LOLIGLNLCvE. 



Teuthhlce (pars) Owen, Proc. Zool. Soc. London, p. 235, 1847. 

 Loligidce D'Orbigny, Ceph. Acdtab., p. 297, 1848. 

 Loligidce (pars) Gray, Catal. Moll. Brit. Mus., vol. i, p. 66, 1849. 

 Loliginidce (pars) H. & A. Adams, Genera, Moll., vol. i, p. 35. 



Body more or less elongated, cylindro-conical. Fins elongated, united 

 and acute posteriorly, sometimes extending the whole length of the 

 body. Pen large, extending the whole length of the mantle, with an 

 acute, short, pen-like anterior shaft, and a broader, thin, lanceolate 

 blade. Connective cartilages of the mantle three, movable. Eyes with- 

 out a thickened false lid. Siphon provided with an internal valve, and 

 attached to the head by a dorsal bridle. Nuchal crests about the ears 

 well-developed. Tentacular club large, with four rows of denticulated 

 suckers on the middle portion. Horny rings of the suckers encircled 

 externally by a raised median ridge. 



On our coast this family is represented only by the genus Loligo. At 

 Bermuda and in the West Indies a species of Sepioteuthis occurs, which 

 will probably hereafter be found on our southern coast. In the latter 

 the fins extend along the whole length of the mantle. 



LOLIGO Lamarck, 1779. 



Loligo (pars) Lamarck, Syst. Anim. sans Vert., p. 60, 1801. 

 Pteroteuthis (subgenus) Blainville, Man. Malac, p. 367, 1825. 

 Loligo (restricted) D'Orbigny, Ceph. Ac6tab., p. 305, 1848. 

 Verrill, Trans. Conn. Acad., vol. v, p. 307, Feb., 1881. 



Body elongated, tapering to a point behind; anterior edge of mantle 

 free dorsally, and prolonged into a lobe, covering the end of the pen. 

 Caudal fin posterior, elongated-rhomboidal, united to e the sides of the 

 body to the posterior tip. Mantle connected to the neck by a dorsal 

 and two lateral connective cartilages ; lateral cartilages of the mantle 

 simple longitudinal ridges; corresponding cartilages, on the base of the 

 siphon, irregularly ovate, with a median groove. Pen as long as the 

 mantle, anteriorly narrow, with a central keel and two lateral ridges ; 

 posteriorly broad, thin, lanceolate, concave, but not involute. Head 

 l 'her large; eyes without lids, covered with transparent skin, pupil 



