250 A. E. Verrill — North American Gephalopods. 



The generic affinities of this species must be regarded as still 

 somewhat doubtful, owing to the absence of the tentacular-clubs, and 

 most of the suckers of the sessile arms. The characters of the ' pen ;' 

 of the dentition, especially of the median teeth ; of the nuchal frills ; 

 of the siphon; and of the cartilaginous facets of the neck, all indicate 

 that it belongs in the family Onychoteuthidoe, near Onychoteuthis. 

 But in this family there is great diversity as to the arrangement of 

 the hooks and suckers, constituting the armature of the arms. Some 

 of these combinations are as follows : 



Sessile arms with suckers o?ily. 



Onychia. — Tentacular-club with two central rows of hooks, rows 

 of small suckers along each margin, and a cluster of suckers and 

 tubercles on the ' wrist.' Sessile arms with smooth suckers. 



Onychoteuthis (typical). — Tentacular-club with two rows of hooks, 

 with an apical cluster of suckers, and with a cluster of suckers and 

 tubercles on the wrist. Sessile arms with suckers in two rows. 



Ancistroteuthis (typical). — Two central rows of hooks, with prox- 

 imal and apical suckers on the club, as in the last. Pen with a long, 

 terminal, cartilaginous cone. 



Ancistroteuthis Krohnii. — Tentacular-club with one row of suckers 

 and one of hooks in the middle portion, 



Dosidicus. — Tentacular-club with hooks. Sessile arms with large 

 suckers on the proximal jDortion and small ones on the distal. Pen 

 with a solid cone. 



Sessile arms with both suckers and hooks. 



Gonatus. — Tentacular-club with one or two central hooks proxi- 

 mally, and with numerous, multiserial, small suckers, distally. Ses- 

 sile arms with four rows of suckers, those of the two central rows with 

 a median hook, the outer ones serrate. 



Abralia. — Tentacular-club with two rows of alternating hooks and 

 suckers, in the middle, and with clusters of suckers on the wrist and 

 apex. Sessile arms with hooks on the basal portion, and suckers 

 toward the tips. 



Lestoteuthis (gen. nov.). — Tentacular-club with numerous suckers, 

 and few large central hooks. Sessile arms dissimilar ; lower ones 

 with four rows of suckers ; upper with two central rows of hooks, 

 and with marginal suckers on each side. Pen with a long terrninal 

 cone. (Type A. Kainschatica Middendorff, sp.) 



