260 " ENDEAVOUR " SCIENTIFIC RESULTS. 



first widening, tlien narrowing, so that in this general region: 

 this area is elongate-oval in outline ; 13th sucker of dorsal 

 series smaller than its predecessors, the 14th very con- 

 spicuously reduced and followed by 14 excessively minute 

 suckers, normally zigzag in position, but becoming largely^ 

 by reason of their reduction in size, relatively distant from 

 one another ; 2yth and 30th suckers of this row suddenly 

 larger, the remaining suckers to the extremity of the arm 

 appearing normal in every particular ; in the ventral series, 

 12th sucker not only smaller than its predecessor, but also 

 marginal, being succeeded by 17 very minute suckers in 

 single file similar to those of the zigzag dorsal series, but a 

 trifle larger, and elevated from the dorsal portion of the 

 sucker bearing face of the arm by a narrow ridge ; 30th 

 sucker of ventral series somewhat larger, 31st still larger, 

 32nd again larger as well as inwardly displaced ; beginning 

 with 31st sucker members of this series normal in size and 

 zigzag arrangement, so that the usual 4-rowed appearance 

 prevails on this portion of the arm ; central portion of face 

 of arm where reduced suckers are borne conspicuously 

 narrowed, again expanding with the recommencement of 

 the normal suckers.* 



Tentacles relatively short (two -thirds the length of the 

 body), stout, in section rounded-triangular with a somewhat 

 flattened inner face ; cluh (PI. Ixxii., figs. 3-4) expanded, 

 semilunar in outline, its inner face flattened and armed with 

 excessively numerous, minute, crowded suckers, slightly and 

 evenly graduated in size, near the centre of the club seeming 

 to comprise about 12 series. Suckers of club (Fig. 49) deeply 

 basin-shaped, having a wide, nearly circvilar papillary area 

 and relatively small apertures ; diameter of an average 

 sucker on middle portion of club 0.3 mm. ; horny rings 

 armed all around with possibly 18-22 excessively minute, 

 b pointed teeth, so small that exact number cannot be stated 

 surely with present facilities ; two suckers larger than 

 remainder jvist within the curious pocket-like flap crowning 



* To avoid possible confusion the description of the hectocotj'lus has 

 been drawn throughout from one specimen, the type. Other males ex- 

 amined show certain divergencies, chiefly in the way of slight variations in 

 the numbers of suckers occupying the respective regions of the arm and so 

 on. The modified suckers of the ventral row sometimes show traces of 

 the original zigzag arrangement, while in one specimen the uniserial ar- 

 rangement nowhere prevails. In none of the specimens, however, does 

 the lateral displacement of these suckers equal that of those opposite them 

 in the dorsal series. 



