BELOSEPIA, COCCOTEUTHTS. 199 



situated in nipples ; head 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-delined 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 p3 T ramidal deposit of 

 chalky plates, the apex placed to the posterior end, the striye 

 distant and coarse, with a central longitudinal groove. 



Length, including tentacles, 2-8 inches. 



Gape of Good Hope. 



Family XII. BELOSEPIID.K. 

 Genus BELOSEPIA, Volt/.. 



Three species from the European tertiary are referred to this 

 genus, which is doubtfully separable 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 by cavities. The rostrum is thick, turned towards the 

 back ; the wing-like extensions of the shell are chalk} 7 . 



S. SEPIOIDEA, Blainv. PI. 95, figs. 448, 449. Eocene, London. 



Genus COCCOTEUTHIS, Owen. 



Two fossil species from the Jurassic of Europe are included 

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

 of the shell granulated, but the ventral side is horny instead of 

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



C. HASTiFORMis, Ruppell. PI. 95, fig. 450. Solenhofen. 



Family XIII. BELEMNITID^E. 



The shell of Belemnites consists fundamentally of: 

 1. A hollow cone, the phraymocone (figs. 451, 452), with a 

 thin shelly wall, termed the conotheca, and which is divided by 

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

 bers or loculi ; the chambers are perforated near the ventral 

 margin by a siphuncle. 



