HISTIOTEUTHIS. 29 



111 the first genus, Chiroteuthis, the shell is narrow, and 

 rather dilated or winged at each end, and there are 

 scattered cups at the bases of the long tentacular arms ; 

 in the second genus, Histiofeutkis, the shell is lanceolate, 

 and pennate. 



Genus CHIROTEUTHIS, D'Orbigny. 



Arms free, cartilages of the mantle dilated below ; 

 rings of cups contracted in the middle. 



Shell, slender, dilated at each end. 



Ex. C. Veranyi, Ferussac, pi. 2, fig. 2. Shell, C. 

 Veranyi, fig. 2, a. 



In this genus, the tentacular arms are slender and ex- 

 tremely elongated, with distant sessile cups on the pedun- 

 cles, and four rows of pedunculated claws on their expanded 

 end. The C. Veranyi does not exceed four inches in 

 length, the tentacular arms are two feet and a half, and as 

 slender as a thread, organs admirably adapted to encircle 

 any prey that may be seen floating at a distance and 

 unconscious of the impending danger. 



Sj)ecies of Chiroteuthis. 

 Bonplandi, D'Orh. Veranyi, Ferm. 



Genus HISTIOTEUTHIS, D'Orbigny. 



Three upper pairs of sessile arms webbed nearly to the 

 end ; cartilages of the mantle linear, elongate ; rings of 

 cups convex externally. 



Shell broad, pennate. 



Ex. H. Bonelliana, Ferussac, pi. 2, fig. 3. Shell, 

 H. Bonelliana, fig. 3, a. 



