86 Transactions. — Zooloyy. 



meantime I place it under Architeuthis, with the full knowledge, 

 however, that it cannot possibly remain there permanently, 

 the shape of the arms and the fins alone being sufficient to put 

 it out of association with that genus. As soon as opportunity 

 offers, I hope to make a further study and fully determine its 

 affinities. 



Architeuthis longimanus. 



Sessile arms unequal in size and length, increasing from the 

 dorsal to the ventral. First pair (dorsal) shorter than the body, 

 triangular in section, with a stout fleshy membrane on each of 

 the inner angles, the inner one slightly longer than the outer ; 

 this membrane can be folded over the suckers. Second pair 

 (sub-dorsal), longer and stouter than the last, but not equal to 

 the length of the body ; rectangular in section, the sides and 

 angles being, however, somewhat rounded, with thick fleshy 

 membrane on each of the inner angles ; these membranes are of 

 equal width and strength. A thick crest runs along the outer 

 face of these arms ; it rises nearer the upper than the lower 

 angle, and occupies about three-fourths of the face ; its depth 

 is nearly the diameter of the arm. Third pair (sub-ventral) 

 still larger in all respects, and rather longer than the body ; oval 

 in section, the inner or sucker-face being flattened, each angle 

 furnished as in the preceding arms with a fleshy membrane, the 

 outer being slightly more developed than the other. Fourth 

 pair (ventral) very long and exceptionally stout, rather longer 

 than the head and body together ; trapezoidal in section ; stout 

 fleshy membranes on the inner angles, the outer one the longest. 

 A very stout fleshy crest on the lower posterior angle, and a 

 much longer but slighter on the upper posterior angle. 



The arrangement of the suckers on the sessile arms is very 

 remarkable. The first (dorsal) pair carried fifty-four suckers on 

 each arm, disposed as usual in two alternating rows ; but these 

 suckers were all small. The second had only forty- seven suckers, 

 but these were very much larger than those on the first pair. 

 The third had eighty-six, about the same size or a little smaller 

 than those on the last pair. The fourth carried one hundred 

 and forty-four, all about the same size as those on the second 

 pair. As in the case of all animals belonging to this section, 

 each sucker was stalked, the stalk being inserted on the side ; 

 eacli sucker is strengthened by a bony ring having a number of 

 sharp teeth on the exposed edge. These bony rings are quite 

 white when first taken from a fresh specimen ; but after being 

 in spirit for some time they assume a yellowish horn colour. 

 They are all oblique (see figures). 



Tentacular arms are very long and slender, more than six 

 times the length of the fourth (ventral) pair of sessile arms, or 

 of the head and body together. The arm is nearly round, and 



