HELOSEPIA, ("OCCOTEIITHIS. 1 '.>'•> 



situated in uipples ; liead somewhat rhomboidal, eyes small ; 



arms very short, having two rows of suckers with entire rings ; 



tentacles short, but nearly three times the length of the arms. 



with well-defined clubs, bearing numerous small suckers and 



winged dorsally. Shell very thin, wide, the side margins straight 



and parallel, rounded behind, obtusely pointed in front ; dorsal 



surface smooth, ventral surface with a pj'ramidal deposit of 



chalky plates, the apex placed to the posterior end, the stri;v 



distant and coarse', with a central longitudinal groove. 



Length, including tentacles, 2*8 inches. 



Gape of Good Hope. 



Family XTI. BELOSEPIID.E. 



Genus BELOSEPIA, Voltz. 



Three species from the European tertiary are referred to this 

 genus, which is doubtfully sepai'able from Sepia. The principal 

 character of the shell is the hood of chalky plates, which covers 

 the posterior end ; these partitions are regularly placed and 

 separated b^" cavities. The rostrum is thick, turned towards the 

 back ; the wing-like extensions of the shell are chalky. 



S. Septoidea, Blainv. PI. IKS, figs. 448, 441). Eocene, London. 



Genus COCCOTEUTHIS, O^ven. 



Two fossil si)ecies from the Jurassic of Europe are included 

 under this name. They resemble Sepia in having the dorsal side 

 of the shell granulated, but the A^eutral side is horny instead of 

 chalky ; the posterior end has long wing-like expansions. 



C. HASTiFORMis, Ruppell. PI. 9."). fig. 4o(). Solenhofen. 



Family XIII. BELEMNITID.E. 



The shell of Belemnites consists fundamentally of: — 

 1. A hollow cone, the j^hragniocone (figs. 451, 452), with a 

 thin shelly wall, termed the conotheca, and which is divided b}- 

 transverse septa, concave above and convex below, into cham- 

 bers or loculi ; the chambers are perforated near the ventral 

 margin by a siphvMcle. 



