BY E. M. JOHNSTON, F.L.S. 



left arm hectocotylised at its 

 extremity ; gladius feather-like, 

 its shaft keeled on the ventral side 

 Body rather long or oval, with small 

 lateral fins extending its entire 

 length; siphon attached to the 

 head by muscular bands ; buccal 

 skin with seven projections covered 

 with suckers; a strong wrinkle 

 behind the eyes; otherwise like 

 Loligo 



71 



Genus. 

 Loligo ( — ) 



Sepioteutbis (6) 



(iv.) Family Onychotexjthid^). 

 Body long, cylindrical ; mantle supported by cartilaginous 

 projections; eyes with a lachrymal sinus; arms or 

 tentacles armed with hooks ; siphon with or without 

 bands and valve ; gladius or shell generally lancet 

 form, with end-conus 



Arms with two rows of suckers ; rings 

 not toothed ; tentacles thick ; 

 clubs armed with two rows of strong 

 hooks ; bases of the same also 

 strongly hooked ; gladius or shell 

 lancet form, with a conical 

 commencement 



Genus. 



Onychoteuthis (4) 



Family Ommatostbepbxms. 



Arms short, with two rows of suckers ; 



tentacles short, not retractile ; 



the clubs armed with four rows of 



suckers; siphon valved, fastened 



to the head by bands ; shell lancet 



form, with a hollow end, conus Ommatostrephe (5) 

 Club arm armed with a combination of 



smooth-rimmed suckers and 



tubercles Architeuthis ( — ) 



(A gigantic group of cephalapods.) 



( — ) Family Sepiid^e. 



Eyes covered by skin ; littoral. Body oval, with long lateral 

 fins, uniting behind ; mantle supported by cartilaginous 

 tubercles, fitting into sockets on the neck and siphon ; 

 arms with suckers ; tentacular arms entirely retractile ; 

 siphon valved ; shell (cuttle bone, sepion, or sepiostaire,) 



