LOLIGINID^. 35 



times an internal membranous fringe, and the shell has a 

 hollow conical appendix. These, which are called sagit- 

 tated Calamaries, live in the high seas in large troops ; 

 they are nocturnal in their habits, and form the food of 

 cetacea and pelagic birds. The sailors call them " sea- 

 arrows" or "flying-squids," from their habit of leaping 

 out of the water, often to such a height as to fall on the 

 decks of vessels. 



Sioecies of OmmastrepJies. 



jequipoda, EiippeU. Oualaniensis, Lesson. 



Bartramii, Lesueur, sagittatus, Lam. 



EblanjB, Lcdl. Sloanii, Grai/. 



giganteus, D'Orb. todarus, Bajln. 



Sub-gen. hyaloteuthis, Gray. 



Body transparent, tubercular beneath ; one or two cups on 

 the second pair of sessile arms larger than the others. 



pelagicus, Bosc. 



Doiibtful Species. 



Arabicus, Ehrenh. laticeps, D'Orh. 



Bianconii, Verany. Meneghinii, Verany. 



Fam. LOLIGINID^. 



Eyes covered with skin, simple. Mantle with three in- 

 ternal cartilages, one dorsal and two ventral. 



Shell solid, horny. 



In this family the fins are on the sides of the hinder 

 part of the back ; the eyes are without eyelids and covered 

 with the skin ; the buccal membrane is often furnished 

 with cups ; the ears have a transverse ridge ; the sessile 



