OF CONCHOLOGT. 239 



DESCRIPTION OF TWO NEW SPECIES OF CEPHALOPODS. 



BY S. B. HOWELL, M. D. 



LoLiGO HEMIPTERA, Howell. Plate 13. 



Description. — Body short, thick, cylindrical, obtuse posteri- 

 orly, rounded at the extremity, soft fleshy. 



Length of the sac 2 inches, diameter at its opening 9 

 lines, width at the middle of the fins 11| lines, distance between 

 the fins 9 lines, length of the fins 10 lines. 



Fins or caudal appendage short, very narrow, rounded, thick, 

 fleshy, distant, not half the length of the body. 



Siphuncle long, with valve, broad at the base. Eyes lateral, 

 of large size, covered by a continuation of the common integu- 

 ment, and destitute of lachrymal emargination. Head short, 

 medium, not as wide as the body, flattened anteriorly, 5 lines in 

 length ; width 7 lines. Neck narrowed. Arms ten, small, 

 compressed, furnished with cupules or suckers, becoming smaller 

 as they approach the tips. The superior pair or dorsal arms are 

 the shortest and smallest, length 6 lines ; .the second pair simi- 

 lar in shape, more robust, length 10 lines ; the third pair very 

 robust, exceeding in length the seCi)nd pair, length 12 lines ; 

 the fourth pair not so robust as the third pair, but of the same 

 length. The tentacular arms, or the fifth pair, slender, flattened 

 at the extremity, length 3 inches, terminating in a point. 



Cupules, with ligamentous attachment or foot-stalks, small, 

 rounded, without teeth, and without marginal ring, sj)hincter- 

 form. The cups are arranged in two rows along the arms, be- 

 coming smaller as they approach the tip. 



Beak moderately prominent, horny, of a dark brown on the 

 superior and inferior surfaces ; the angular membrane surround- 

 ing the beak without cupules, though with six short elongations, 

 resembling arms in miniature. 



