niTROTErTTIIS. 105 



ridge, and row of eleven aente, foiir-[)ointed tubeix-les, and many 

 smaller ones on either ventral side of the body ; fins semicircular, 

 broad, tog-ether subrhomboidal ; sessile arms large, conical, very 

 contractile, unequal, proportionate lengths 3, 2, 4, 1 ; cups nearly 

 spherical, rings oblique. Shell elongate, thin, very narrow ante- 

 riorly, lanceolate, rather dilated behind ; tip very sharp, attenu- 

 ated, solid. Total length, 6 inches. 



Indian Ocean. 

 As already stated, D'Orbigny and Graj' have confounded L. 

 cyclura^ Lesueur, a smooth form, with this A'ery remarkal)le and 

 distinct armored species : which is the type of Perotis^ Esch. 



L. Reinhardtii, Steenstrup. 



Body with a toothed, cartilaginous band down the median line 

 of the back ; also two other toothed cartilaginous bands or ribs 

 on each side of the body, which meet at an acute angle exactly 

 at the points where the mantle is united with the funnel on each 

 side ; the proportions of the arms are 3, 2, 4, 1, and they only 

 bear two series of suckers ; the tentacles have four rows of 

 suckers on the outer third, which are continued in a scattered 

 arrangement over the middle third ; the fins are terminally 

 small and roundish. 



Azorefi ; Tropical Atlantic. 



This is nnother remarkable species, and seems to ditter from 

 L. guttata in having two rows of tubercles instead of one on 

 each side of the body. It has not been figured. 



Family Til. CHIROTEUTHID^. 



Genus CHIROTEUTHIS, Orb. 



The great cephalic development of the animals of this very 

 restricted genus, the immense length of the tentacles and the 

 peculiar armament of their clubs, and the gladius expanded at 

 each end, form excellent distinctive characters from the Loli- 

 gopsidiie. 



C. Yeranyi, Fer. PI. 70, figs. 205-271. 



Body smooth ; fins semicircular, together heart-shaped ; head 

 large ; sessile arms very large, rounded, acuminate, order of 

 length 4, 3, 2, 1 ; rings of the suckers on the three upper pairs 



