[131] CEPHALOPODS OF NORTHEASTERN COAST OF AMERICA. 
stance to explain the cause of the brevity of the following description 
[of O. illecebrosus| taken from my drawing.” The drawing was also in- 
accurate for the same reason. 
MYOPSIDA D’Orbigny. 
‘Hyes 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. ‘ 
Famity LOLIGINIDA. 
Teuthide (pars) Owen, Proc. Zool. Soc. London, p. 285, 1847. 
Loligide D’Orbigny, Céph. Acétab., p. 297, 1848.- 
Loligide (pars) Gray, Catal. Moll. Brit. Mus., vol. i, p. 66, 1849. 
Loliginide (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. 
Pieroteuthis (subgenus) Blainville, Man. Malac., p. 367, 1825. 
Loligo (restricted) D’Orbigny, Céph. Acétab., 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 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 
rather large; eyes without lids, covered with transparent skin, pupil 
