390 
A. E. Yerrill — North American Cephalopoda. 
Lestoteuthis YerrilL (revised). 
Gonatus Steenstrup, op. cit.. pp. 9-26. (non Gray). 
Gonatus Yerrill, this volume, pp. 250, 290. 1880, (non Gray). 
Lestoteuthis Yerrill. this volume, p. 250. Feb., 1880. 
Cheloteuthis ( Chiloteuttiis by typ. error) Yerrill, this volume, p. 292, Jan., 1881. 
ChelotetUhis Yerrill, 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 hectocotvlization detected.! 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 with 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.) differs 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 (Lieht.) Verrill. (See pp. 291-294.) 
t Onychoteuthis Kamtschatica Middendorff, 1849. 
Gonatus Fabricii Steenstrup (pars), in Mdrch, Faunula Molluscorum Ins. Fieroeme, 
Yid. MeddeL nat. For.. 1867. p. 102 ; Faunula Mollusc. Islandne, Yid. MeddeJ. 
nat. For. Kjobenhavn. 1868, p. 227. 
Gonatus Fabricii Morch i pars), in T. R. Jones, Arctic Manual, p. 130, 1875. 
Steenstrup. Oversigt over d. Kongl. D. Yidensk. Selsk. Forh., 1881. [Sep. cop}', 
p. 26,] pi. 1, figs. 1-7. 
Yerrill, (pars) this volume, p. 291. 
Cheloteuthis rapox Yerrill, this volume, p. 293, pi. 49. figs. 1 — l f : Bulletin Mus. 
Comp. Zool., viii. p. 110, pi. 2, figs. 1— l f , 1881; Report U. S. Fish Com. for 
1879, p. [76]. pi. 15, fig3. 3-3 f , 4, dentition. 1881. 
Lestoteuthis Fabricii Yerrill. Report of C. S. Fish Com. for 1879, p. [79], pi. 15, 
figs. 1-1', 2-2 4 , pi. 45, figs. l-l d , 1881. 
* The dentition of the type-specimen of Cheloteuthis rapox, 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 beetocotylized. 
