270 



ENDEAVOUR SCIENTIFIC RESULTS. 



which is the largest, the distal smallest, the outline of the- 

 whole structure when fully elevated resembling somewhat a 

 three-arched bridge with its approaches. Suckers borne 

 ostensibly in three rows ;* carpal region and extreme base 

 of club destitute of suckers, the marginal membranes here 

 united across the face of the club to form a broad-limbed 

 " V " by their divergence ; at base of the " V," either 

 originating directly from the fused membranes themselves 

 or with their stalks passing through the membrane substance, 

 are four (sometimes five) rather small suckers, one of them 



quite conspicuously 

 (twice or thrice) 

 larger than the re- 

 mainder; succeeding 

 these in centre of 

 club proper, three 

 gigantic suckers, the 

 middle one largest, 

 borne on long 

 pedicels originating 

 in three large 

 pockets just 

 opposite the 

 fenestrae in the 

 dorsal membra.ne ; 

 flanking these and 

 alternating with 

 them by reason of being borne on the inner face of the 

 dorsal membrane (one respectively just above each 

 supporting pillar (are two suckers rather smaller than the 

 largest of the proximal group ; two fleshy folds springing 

 from the dorsal membrane, one below each of these suckers, 

 traverse the face of the club and are continuous with similar 

 ridges forming the supports of the ventral membrane, finally 

 terminating near the margin of said membrane in three 

 small diverging buttresses ; springing from the two angles of 

 these buttresses, two very small suckers borne by each ventral 

 ridge, or four suckers in all in the ventral row, each pair thus 

 corresponding to a single dorsal sucker ; distal one-fourth 

 of club armed with 40-48 crowded suckers in 4-6 series, at 

 first resembling those of the proximal group, then diminishing 

 in size ventrally and toward the tip, though the two terminal 

 suckers sheltered just below the apical cap are somewhat 



Fig. 57. — Sepia chirotrema $ [524], horny 

 ring from central large sucker of left tentacle 

 club ; camera drawing. 



* As will later appear, I think it evident that the fact that there are 

 twice as many suckers in the ventralmost of these three rows than in either- 

 of the other two signifies that four rows are actually represented. 



