. CEPHALOPODA. 3 



arms with cups and horny rings. Shell horny, flexible, narrow, 

 gradually wider above, terminated by an expansion that forms a conical 

 cavity : a central and two marginal ribs. 

 All seas. 



5. O. sloanil, Gray, I.e., p. 61. Body cylindrical ; fin rather 

 more than one-third the length of the body ; sessile arms compressed, 

 cups equal, oblique, in two rows, higher side of rings with acute teeth, 

 lower smooth ; tentacular arms slightly keeled externally, cups of 

 lower part small., in two rows, of middle part in four rows ; rings with 

 distant teeth all round. Colour purplish, caused by minute dots placed 

 close together ; beak black. 



Bluff; Cook's Strait ; Auckland. Indian Ocean. 



FAMILY LOLIGIDJS. 



Fins either posterior or lateral ; eyes covered with skin ; ears with 

 a transverse ridge ; shell horny, lanceolate, pennate, or spathulate. 



LOLIGO. 



Fins posterior, dorsal, rhombic ; cups of sessile arms in two rows, 

 lateral membranes with cups on the angles ; clubs with four or more 

 rows of cups. Shell pennate, narrow above, and with a central longi- 

 tudinal keeled ridge, forming a gutter within, edge thin. 



All seas. 



6. L. atlStralis, Gray, I.e., p. 71. Body oblong sub-cylindrical ; 

 fins rhombic, half the length of the body ; tentacular arms with four 

 rows of cups. Shell broad, lanceolate, blackish brown, upper end 

 rather broad. 



A dried specimen is in the Auckland Museum. 

 Australia. 



SEPIOTEUTHIS. 



Fins extending the whole length of the back ; sessile arms unequal, 

 with two rows of cups ; tentacular arms long, club enlarged, cups in 

 four rows. Shell pennate, lanceolate, narrow in front and with a 

 central keel. 



West Indies. Cape of Grood Hope. Red Sea. Java. Australia. 



* 7. S. leSSOniana, Fe'russ; Gray, I.e., p. SO. Body elongate, 

 spotted with violet ; fins dilated posteriorly ; sessile arms elongate, 

 cups oblique, rings with distant acute teeth ; tentacular arms bluntly 

 clubbed, cups large, very oblique, rings with distant acute curved 

 teeth ; buccal membrane with cups. Shell lanceolate, broadest in the 

 middle, outer edge not thickened, central rib broad, extended in front, 

 one-fifth the length. 



New Guinea. 



8. S. major, Gray, I.e., p. 83. Body cyl adrical, attenuated be- 

 hind ; fins rounded, fleshy, most dilated in the middle of the body ; 

 buccal membrane without cups ; sessile arms Bather short, order of 

 length, 4, 3, 2, 1, cups large, rings with short blimt teeth on the higher 

 side ; tentacular arms strong, with cups and ri::gs like those of the 



