REPORT OF COMMISSIONER OF FISH AND FISHERIES. [ 206 ] 
simple ridges; those of the siphon ovate. Nuchal olfactory crests one 
or more on each side, longitudinal. Caudal fin of adult, large, spear- 
shaped. Ventral arms with four rows of denticulated suckers. No 
trace of hectocotylization detected.* Lateral and dorsal arms with two 
marginal rows of small suckers and two median rows of larger hooks. 
Tentacular arms with a central row of hooks, the two distal ones largest; 
with a large distal and two lateral groups of small suckers, in numerous 
rows; and with a lateral group of peculiar connective suckers, alter¬ 
nating with tubercles, near the lower margin, and a row of smaller ones 
extending for a long distance down the margin of the arm; upper mar¬ 
gin of the arm witji a band of small, pediceled suckers along about half 
its length. Pen narrow, with a short, hollow, posterior cone. 
Gonatus Gray, typical (non Sars, Steenst.), differs in having on all the 
arms four rows of true suckers, all of which are similar, and have the 
marginal ring divided into a series of several sharp denticles on the 
higher side. This may be a sexual character, but the two forms should 
be kept separate, awaiting further evidence. Steenstrup does not give 
the sex of his specimens. 
Lestoteuthis Fabricii (Fabr.) Verrill. (See pp. [76], [79].) 
? Onychoteuthis Eamtschatica Micldendorff, 1849. 
Gonatus Fabricii Steenstrup (pars), in Morch, Faunula Molluscorum Ins. FaeriS- 
erne, <Vid. Meddel. nat. For., 1867, p. 102; Faunula Mollusc. Islandi®, 
<[Vid. Meddel. nat. For., Kjobenhavn, 1868, p. 227. 
Gonatus Fabricii Morch (jpars), in T. R. Jones, Arctic Manual, p. 130,1875. 
Steenstrup, Oversigt over d. Kongl. D. Vidensk. Selsk. Forh., 1881. [Sep. 
copy, p. 26], pi. 1, figs. 1-7. 
Verrill, (pars) Trans. Conn. Acad., v, p. 291; this vol., p. [79]. 
Cheloteuthis rapax Verrill, Trans. Conn. Acad., v, p. 293, pi. 49, figs. l-l f ; Bul¬ 
letin Mus. Comp. Zool., viii, p. 110, pi. 2, figs. l-l f , 1881. 
Plate XV, fig. 1-lc, 2-2d, 3-3/, 4. Plate XLV, fig. 1-ld. 
Body elongated, tapering to an acute posterior end; anterior edge of 
mantle nearly even dorsally, with a slight median emargination; lat¬ 
eral angles well-marked, in line with the internal connective cartilage, 
which forms a long, simple, longitudinal ridge. Caudal fin broad, spear- 
shaped, broadest in advance of the middle; the lateral angles are well 
rounded; the tip is very acute; the anterior lobes are broadly rounded, 
projecting forward beyond the insertion. Head large, short, and broad; 
eyes large, occupying most of the sides of the head; eye lids well de¬ 
veloped, thickened, with a narrow, oblique sinus. Siphon large, in a 
deep groove, with two stout, dorsal bridles; lateral connective cartilages 
large, long-ovate, posterior end broadest. One olfactory crest on each 
side, behind the eye, in the form of a low, longitudinal membrane; 
slight indications of another, lower down; a small, fleshy, flattened, 
projecting papilla near the auditory opening. The outer buccal mem- 
* My largest specimen, although apparently adult, is not sexually mature. An older 
specimen might be hectocotylized. 
