890 ^4. E. Vtrr'dl — J^ortli American Cephalopods. 



LestOteuthis Venill, (revised). 



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



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



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



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



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



Oilontopliore willi 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 with 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.) diflfers in having four 

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

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

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



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

 ? Onychoteuthis Kamtschatica Middendorff, 1849. 



Gonatus Fabricii Steenstrup (pars), in Morch, Faunula MoUuscorum Ins. Fjeroerne, 

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

 nat. For. Kjobenliavn, 1868, p. 227. 

 Gonatus Fabricii Morch {pars), in T. K. Jones, Arctic Manual, p. 130, 1875. 

 Steenstrup, Oversigt over d. Kongl. D. Vidensk. Selsk. Forh., 1881. [Sep. copy, 



p. 26,] pi. l.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. 1-1*', 1881; Report U. S. Fish Com. for 

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

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

 figs. l-V, 2-2^ pi. 45, figs. 1-1'', 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. 



•j- My largest specimen, although apparently adult, is not sejjually mature. An 

 older specimen might be hectocotylized. 



