i CEPHALOPODA. 



sessile arms. Shell lanceolate, widest at about two-fifths of its length, 

 edge not thickened, central rib broad, extended in front about one- 

 sixth of its length. Yellowish white, spotted with violet ; length of 

 body sometimes 13 inches, perhaps more. 



Common. 



There is nothing in Dr. Gray's description of S. major in hia cata- 

 logue of Cephalopoda" that does not answer for this species, but the 

 description is too short to feel confidence in the identification. 



Cape of Good Hope. 



FAMILY SEPFADJE. 



Shell calcareous, with a hard back ; body short, oval or rounded ; 

 fins lateral, as long as the back, separated from one another by a free 

 space ; sessile arms with four rows of cups. 



SEPIA. 



Body large ; fins narrow ; head large, wider than long ; eyes with 

 an inferior eyelid ; sessile arms short, strong ; tentacular arms long, 

 slender, terminal club large. Shell ovate or oblong, externally convex 

 with a horny edge and an acute tip ; the cavity filled with layers of a 

 cellular, calcareous substance. 



"World-wide. 



9. S. apama, Gray, I.e., p. 103. Cuttle-fish. 



Animal. ? Shell oblong, postei'ior part produced, acute, with a 

 callosity at the posterior edge of the cavity ; apex blunt, rugose ; 

 anterior extremity ixmnded, covered with a strong cartilaginous side ; 

 central portion rather convex. 



A single mutilated shell. 



Australia. 



FAMILY SPIRULID^;. 



Body sub-cylindrical ; eyes covered with skin, and with a lower 

 eyelid. Shell calcareous, internal, spiral, chambered, chamber traversed 

 by a ventral siphon. 



SPIRULA. 



Body oblong ; fins two, small ; sessile arms with numerous cups ; 

 tentacular arms long. Shell thin, involute in the same plane, whorls 

 separated from each other, septa concave outwards, with a fuuuel- 

 shaped siphon on the inner side. 



All warm seas. 



10. S. IcSViS, Lituus Icevis ; Gray, I.e., p. 116. Spirilla australis, 

 Owen. Voy. Samarang, Mollusca, p. 13 ; not of Lamark. Posterior 

 part of the body furnished with a disc, covering and concealing the 

 shell, and with semicircular fin-like appendages on each side ; mantle 

 smooth. Shell white, semi-transparent. 



Abundant. 



ORDER TETRABRANCHIATA. 



Body protected by an external shell, to which it is attached ; eyes 

 peduncled ; arms very numerous, retractile. Shell chambered and 

 siphuncled. 



