38 LOLIGINID^. 



Genus TEUTHIS, Aristotle. 



Head separate from the body. Mantle free all round. 

 Cups of sessile arms in two rows ; lateral membranes with- 

 out cups. Fins posterior, dorsal, rhombic. 



Shell as long as the back, pennate, edges thin. 



Ex. T. parva, Rondeletius, pi, 4, fig. 4. Shell, T. parva, 



4, a. 



In TeutJiis the body is elongate and acute behind ; the 



fins are rather behind the middle of the sides of the back, 



forming together a heart-shaped expansion ; the labial 



membrane is simple, not produced into angular lobes, and 



destitute of any cups ; the shell is lanceolate and narrow. 



There are two species, one from the European, the other 



from the Indian Seas. 



Species of Teuthis. 

 parva, Rondelet. Sumatrensis, UOrh. and Ferus. 



Genus SEPIOTEUTHIS, Ferussac. 



Head separate from the body. Mantle free all round. 

 Fins occupying the sides of the body. 



Shell as long as the back, pennate, broad, edges some- 

 times thickened. 



Ex. S. Blainvilliana, UOrhigny and Ferussac.^ pi. 4, 

 fig. 5. Shell, S. Blainvilliana, fig. 5, a. 



In most respects Sepioteutliis resembles Loligo, but the 

 fins are lateral, and as long as the body ; the external ear 

 is furnished with a transverse crest, enlarged and curved up 

 in front ; the sessile arms are conical, subulate, unequal, 

 and externally finned, with the cups in two series. There 

 are about twelve species, chiefly from the Indian Seas. 



