CEPHALOPODA. — BERRY. 



223 



Fig. 0. — Calliieuthifi miranda J 

 [545], base of left tentacle, show- 

 ing accessory muscular cord and 

 pouch. 



Tentacles stout, of moderate length, perhaps a third longer 

 than the sessile arms ; at the base greatly compressed dorso- 

 ventrally, so that their depth from the oral to the aboral 

 surface is nearly three times the transverse dimension ; 

 gradually tapering for about two-thirds their length, then 

 becoming more triangular in section, due to the flattening and 

 widening of the oral face in the region where the fixing 

 apparatus commences ; oral 

 surface of tentacle at extreme 

 base anchored by a slender 

 cord of muscle (Fig. 7) origin- 

 ating in a sort of secondary 

 pocket lying between the buccal 

 membrane and the true ten- 

 tacle pocket, and separated 

 from the latter by a fleshy fold 

 connecting the bases of the 

 ventrolateral and ventral arms ; 

 the triangular space between 

 fold, cord, and tentacle stalk 

 filled by an extremely tenuous, 

 transparent, veliform membrane, extending down on either side 

 of the fold into both pockets, appearing to be firmly attached 

 at all points ; entire oral face of stalk from intersection of 

 basal muscle cord to the carpal region marked by a shallow 

 but narrow and quite sharply delineated longituclinal groove 

 in the median line. Tentacle club (PI. Ixii., fig. 2) spatulate, 

 expanding near its base to about double the width of the 

 carpus, thence tapering rapidly to a rounded point ; sucker- 

 bearing area bordered on both sides by a well-developed 

 marginal membrane, the dorsal membrane outwardly paral- 

 leled along the distal half of the club by a strong, flattened 

 keel. Suckers on the club proper exceedingly crowded, 

 apparently borne in six rows over the entire club except the 

 greatly narrowed extremity where they are much reduced 

 in size and appear in four rows, 

 terminating in the usual apical group 

 of 6-7 suckers somewhat larger 

 than their immediate predecessors 

 and circularly disposed ; largest 

 suckers about the 4th-6th from the 

 base of the two do rso -median rows, 

 those in the series ventral to these 

 becoming progressively smaller ; 

 horny rings bearing numerous minute 

 acute, pointed teeth (Fig. 6) around 

 their entire circumferences, 



Fig. 7. — CalUteuthis mi- 

 randa $ [•^45], portion of 

 horny ring of tentacular 

 sucker ; camera drawing 

 from a mount in balsam. 



