27 



12. Octopodoteuthis, Euppell and Krohn, Body conical; fins covering nearly the 



1844. whole of the back, rather rounded ; arms 



= Veranya, Krohn, 1847. with suckers in two rows concealing 



hooks, tentacles very short ; pen lanceo- 

 late with a marked longitudinal ridge. 



13. Ancistrocheirus, Gray, 1849 Body elongate; fins covering nearly the 



whole of the sides, triangular; arms 

 with two rows of hooks without cups, 

 tentacles long, with large hooks ; pen 

 narrow-lanceolate. 



(£.) Arms with suckers having homy margins, tentacles furnished 



with hooks. 



14. Onychoteuthis, Lichtenstein, 1818... 

 = Onychia (partim) Lesueur, 1821. 

 = Ancistroteuthis, Gray, 1849. 



Body somewhat elongate ; fins terminal, 

 triangular ; arms with two rows of 

 suckers, tentacles in part retractile, 

 furnished with hooks in the upper part 

 of, and with suckers at the base of the 

 club ; pen curved, narrow, contracted 

 near the upper part, with a hollow 

 conical point at its lowest extremity. 



15. Dosidicus, Steenstrup, 1856 Body elongate ; fins terminal, arms with 



large suckers at base, at extremities small. 



(7.) Arms and tentacles with suckers having horny margins. 



16. Ommastrepkes, D'Orbigny, 1845 ... Body elongate; fins terminal, triangular; 



arms with two rows of suckers, having 

 a dentated margin on the upper side ; 

 tentacles not retractile, with four toavs 

 of suckers ; pen long, with the sides 

 contracted towards the base, with a 

 central and two marginal ribs, the apex 

 hollow, conical, without septa. 



(8.) Arms and tentacles without hooks, arms fringed. 



17. Thysanoteuthis, Troschel, 1857 Body elongate ; fins lateral as long as the 



body ; pen arrow-shaped. 



V. — Second group of the naked-eyed Cuttles having a horny internal 

 shell, without a head band. Mantle strengthened by ridges, 

 fitting into grooves at the base of the funnel and on the back 

 without a neck band. Body short. Fins terminal rounded. 

 Head large. Eyes without a lacrymal sinus. Arms long, united 

 or not by a membrane. Tentacles very long, not retractile, with 

 four or six rows of suckers. Funnel without a valve, Chiro- 

 teuthidse (Gray, 1849). Two genera, Chiroteuthis and Histio- 

 teuthis. 



18. Chiroteuthis, D'Orbigny, 1839 Arms with two rows of suckers on stalks ; 



tentacles with small cups along their 

 whole length, terminated by four rows 

 of cups on stalks carrying claws ; Den 

 slender, lance-shaped at both extremities. 



