44 K. MITSUKURI AND S. IKEDA. 



had larger suckers on the whole than those of the dorsal row. Their 

 rings (Fig. 7) were 1-1. '2 cdi. in diameter, and were beset with fine 

 nearly equal teeth. The suckers on the two outer rows were very 

 much smaller, and more oblique, and set on more slender pedimcles. 

 Their horny rings had nearly equal fine teeth. Towards the tip of the 

 tentacle, these rows became indistinct and irregular, while the suckers 

 grew gradually smaller. Proximally to the middle portion of the club, 

 the rows became suddenly indistinct, and at the same time their suckers 

 became small ; at first they were crowded in several irregular rows, 

 but as we proceeded further, they became further apart, and were 

 arranged in two alternating rows (see Fig. 3). The horny rings of 

 these suckers were toothless. Scattered among these small suckers 

 were low, conical, smooth wart-like prominences whose diameter was 

 about the same as that of the small suckers. These are without doubt 

 the same as the prominences described by Prof. Verb ill* in the 

 corresponding part of Arclilteitthis Harvey i as " intended to furnish 

 secure points of adhesion for the corresponding suckers of the 

 opposite arm, so that, as in some other genera, these two arms can be 

 fastened together at this wrist-like portion, and thus may be used 

 unitedly." The small suckers were found along the entire length of 

 the tentacular arms at quite long intervals (10-15 cdi.). The wart-like 

 prominences no doubt accompanied these suckers, one being found near 

 each sucker as Verrill describes, but unfortunately we did not 

 look lor them until the arm was dried, and the prominences were no 

 longer clearly recognizable, although we thought we could see such at 

 several places. The club and the part immediately proximal to it were 

 preserved hi alcohol, and on this we can see the prominences accom- 

 panying the suckers one by one. 



The Buccal Membrane had seven fieshy tubercles or 

 processes (Fig. 1). Of these one was median, opposite the interval 

 between the first (dorsal) pair of arms, and six others were opposite 



* A. E. Verrill :— The Gigantic Squids (Architeuthis) and their Allies, etc. Trans. 

 Conn. Acad. Sci. Yo\. V. 



