CEPHALOPODA 



611 



A. princeps Verrill (Fig. 960). Length of body up to 6 m.; of the 

 tentacular arms 11 m. and more ; of the sessile arms 3 m. ; of beak 12 cm. ; 

 diameter of suckers 30 mm., of the eyes 35 cm. : in the deep sea, thrown 

 up occasionally on the coast of Newfoundland; the largest cephalopod. 



Family 4. ONYCHOTEUTHIDAE. 



Body cylindrical, fins terminal or lateral; tentacular arms very long 

 and furnished with retractile hooks as well as suckers; shell lanceolate, 

 with a terminal cone; eye naked, without a cornea: 23 species; pelagic. 



■*>* *!>,' 



Fig. 959 



Fig. 960 



Fig. 959- 



-Ommastrephes iUecehrosus (Verrill). Fig. 960 — Arcfiiteuthis princeps 

 (Verrill). 



Onychoteuthis Lichtenstein. Body elongate; sessile arms without 

 hooks and with 2 rows of non-denticulate suckers ; tentacular arms, thick, 

 with 2 rows of strong hooks, with a group of rounded suckers at their 

 base : 10 species, 1 on the Atlantic and 1 on the Pacific coast. 



0. banksi Leach. Head with 11 longitudinal ridges; fins rhombic, 

 wider than long, about half the length of the body; length 15 cm.; color 

 brownish, with blue around the eyes: in all seas; often common. 



