33' 



Manchester Memoirs, Vol. xlviii. (1904), No. %\. 9 



'Rows of suckers not increasing in number towards the 

 tips of the arms ; stoutly built forms ; both dorsal 

 arms hectocotylised Rossia. 



Rows of suckers increasing in number towards the tips 

 of the arms ; slightly built forms ; only the left 

 dorsal arm hectocotylised Semirossia. 



/Fins marginal extending the whole length of the 



I mantle ; body oval 35 



34-\Fins terminal, together heart-shaped or triangular in 

 I form ; body cylindrical, more or less pointed behind. 

 I (LoLiGiNiDiE) 37 



(A hard cuttle-bone internally. (Sepiid^) 36 



35-] 



(A horny pen internally Sepioteuthis}^ 



fNo glandular pores on the mantle Septa. 



36. 



A glandular pore at the posterior extremity between 

 the fins Sepiella. 



Two rows of pores on the inferior surface of the 

 mantle Hemisepius. 



Siphon without bridles ; suckers without the raised 

 margin round the horny ring ; hectocotylisation 

 affecting all the suckers of the left ventral zxn\...LoUolus. 



3lA 



38. 



Siphon with bridles and suckers with raised margin ; 

 hectocotylisation affecting only the distal portion of 

 the arm 38 



'Fins together forming a spear-head or triangle ; sperma- 

 tophores received in the buccal region on a round 

 cushion just below the mouth Loligo 



Fins thick and short, forming a transverse oval ; 

 spermatophores received within the mantle near 

 the left gill Lolligu?icula. 



