58 
CATALOGUE OF CEPHALOPODA. 
ble, seven-lobed, without cups. — Body elongate, cylindrical, very 
long, acuminated behind, truncated, square in front. Cartilages 
on base of siphuncle, contracted below and with a tubercle 
on each side, on inside of mantle enlarged, thick, and with 
transverse rib below. Fins posterior, terminal, very broad, 
together forming a transverse rhomboid. Aquiferous pores be- 
tween the third and fourth pairs of arms ; four buccal pores, one 
on each side of the base of the first pair, and one on each side 
between the third and fourth pair, communicating with a large 
cavity which surrounds the mouth ; two anal pores on each 
side of the siphuncle, outside of the external band. — Sessile 
arms conical, subulate, upper and lower quadrangular, the others 
triangular, compressed, unequal ; in the following order, 3, 2, 
1, 4 ; cups very oblique, fleshy, distinct ; rings oblique, 
toothed. Tentacular arms not retractile, short, strong, thick, 
with a slight longitudinal ridge, scarcely enlarged at the end, 
webbed at the tip ; cups oblique, fleshy, in four alternate lines, 
two middle series large, two lateral small, with a rounded basal 
and apical group of small sessile cups.— Siphuncle lodged in a 
cavity, short, broad, with superior medial bands, and an internal 
valve above. — Shell horny, flexible, as long as the body, narrow, 
gradually wider above, with a central and two marginal ribs ; 
apex with a hollow conical cavity, without any septa. 
Living in the high seas in large troops, nocturnal ; the food of 
Cetacea and pelagic birds. 
Calamar flesches Blainv. Diet. Sci. Nat . 1823. 
Cycria Leach , MS. 1817. 
Ommastrephes D'Orb. Moll. Viv. et Fos. i. 412. 1845 ; Desk . in 
Lamch. Hist. xi. 239; Gray, Proc. Z. Soc. 1847, 206. 
? Peroteuthis Ehrenb. 
Loligo sp. Lamck., Ruppell. 
Sepia sp. Linn . 
Onychoteuthis sp. Munster. 
§ Body opaque, fleshy , smooth above and below. Cups of sessile 
Arms equal, moderate . 
* Second and third Pairs of sessile Arms without any membra - 
naceous Fringe on the inner Edge of the ventral Side, but only 
a Series of small conical Tubercles. 
| The tentacular Arms with eight Rows of numerous small Cups at 
the End near the Tip. 
1. Ommastrephes sagittatus. 
Head large. Body elongate, cylindrical. Fins broad, together 
rhomboidal. Sessile arms thick, long ; rings of cups variable. 
