390 ^1. E. Vtrrill — North Auierican Ctphalopods. 



LestOteuthis Venill. (revised). 



Gonatus Steenstrup, op. cit., pp. 9-26. (non Gray). 



Gonatus Venill, this volume, pp. 250, 290, 1880, (non Gray). 



Lestoteuthis Verrill, this volume, p. 250, Feb., 1880. 



Cheloteuthis ( ChiloteutJm by typ. error) Verrill, this volume, p. 292, Jan., 1881. 



Cheloteuthis Verrill, Bulletin Mus. Comp. Zool., viii, p. 109, March, 1881. 



Odontophore with only five rows of teeth.* Mandibles very acute, 

 strongly compressed. Lateral connective cartilages of the mantle are 

 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. f Lateral and dorsal arms with 

 two marginal rows of small suckers and two median rows of large 

 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 wuth a lateral group of peculiar con- 

 nective suckers, alternating Avith tubercles, near the lower margin, 

 and a row of smaller ones extending for a long distance down the 

 margin of the arm ; upper margin of the arm with 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.) difl:ers in having four 

 rows of true suckers, similar on all the arms. This may be a sexual 

 character, but tlie two forms should be kept separate, awaiting 

 farther evidence. Steenstrup does not give the sex of his specimens. 



Lestoteuthis Fabricii (Licht.) Vemll. (See pp. 291-294.) 

 ? Onychoieuthis Kamtscliatica Middendorff, 1849. 



Gonatus Fabricii Steenstrup [pars], in Morch, Faunula Molluscorum Ins. Fa'roerne, 

 Vid. Meddel. nat. For., 1867, p. 102 ; Faunula Mollusc. Islandia^, Vid. Meddel. 

 mat. For. Kjobenhavn, 1868, p. 227. 

 Gonatus Fabricii Morch (pars), 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) this volume, p, 291. 

 Cheloteuthis rapax Verrill, this volume, p. 293, pi. 49, figs, 1-1'; Bulletin Mus. 

 Comp. Zool., viii, p. 110, pi. 2, figs. 1-lf, 1881; Report U. S. Fish Com. for 

 1879, p. [76], pi. 15, figs. 3-3'', 4, dentition, 1881. 

 Lestoteuthis Fabricii Verrill, Report of U. S. Fish Com. for 1879, p. [79], pi. 15, 

 figs. 1-P, 2-2^ pi. 45, figs, l-l'i, 1881. 



* The dentition of the type-specimen of Cheloteuthis rapax was figured and described 

 by me, several months ago, in the report of the U. S. Fish Com., for 1879. 



f My largest specimen, although apparently adult, is not sexually mature. An 

 older specimen might be hectocotylized. 



