28 CHIROTEUTHIDiE. 



Ex. L. cyclura, Lesueur, pi. 1, fig. 9. Shell, L. cyclura, 

 fig. 9, a. 



In this genus, the eyes are very large and beautiful ; 

 the head though small, is broad ; the buccal membrane is 

 seven lobed without cups, and the siphuncle is very large and 

 notched on the sides. In some species the body is smooth, 

 forming Loligopsis proper, in others, the sides have rows of 

 acute tubercles, forming the subgenus Leachia of Lesueur, 

 or Perotis of Eschscholtz. There are eight species, from the 

 North Sea, Atlantic, Mediterranean, India, Japan, and the 

 South Sea. 



Species of Loligo2ysis. 



QWx^so'^iQrdi,, Adams and Reeve. vermicolaris, Ruiypell. 

 pavo, Lesueur. Zygoena, Verany. 



Subgen. Leaciiia, Lesueur (Perotis, Escn.) 

 Sides with rows of acute tubercles. Shell solid at the tip. 

 cyclura, Lesueur. 



Douhtftd Siyecies. 



chrysophthalmos, D'Orh. Peronii, Lam. 



dubia, Rathke. 



Fam. CHIROTEUTHID^. 



Eyes naked, simple above. Mantle furnished with 

 three internal cartilages, one dorsal, and two ventral. 

 Siphuncle simple, without a valve. 



Shell solid, horny. 



The fins in this family are on the hinder part of the 

 back ; the body is elongate and tapering, the ears are with- 

 out any crest, the buccal membrane is short, and the 

 tentacular arms are outside the web, and not retractile. 



