CEPHALOPODA. — BERRY. 



245 



pair of squarish outline, the dorsal outer angle subcarinate, 

 the lower keeled ; third pair roughly triangular, their con- 

 spicuous outer keels continuous wdth the tentacle sheaths 

 and thus with the broad outer keel of the squarish ventral 

 arms, the latter again keeled on their inner {i.e., ventral 

 aboral) margins. Trabeculated swimming membranes well 

 developed on all the arms, especially the third, though quite 

 narrow on the ventral pair. Suckers small, biserial, more 

 or less kettle-shaped ; oblicpiely perched on short conical 

 pedicels ; apertures notched at the apex ; horny ring (Figs. 

 29-30) armed along their superior margins with (in the largest) 

 12-13 very long, narrow, pointed teeth, reduced to rudiments 

 on the sides and obsolete below. A large sucker from near 

 the middle of the right third arm has a maximum diameter 

 of 1.57 mm. 



Left ventral arm of male hectocotylized (PI. Ixix., tig. 2), the 

 proximal portion apparently nonnal for about three-fifths 

 the total length, or about the first 17 pairs of suckers ; at 

 this point suckers of ventral series becoming much reduced 

 and the thickened bases of their pedicels ver^' elongate, 

 especially the first nine to suffer the modification ; first of 

 these modified pedicels possessed of a small but umnistakable 

 sucker with a well- 

 developed horny ring, 

 those folloAving ha\'ing 

 their suckers reduced to 

 tiny, knob-like swellings 

 at their tips (Fig. 34) ; 

 in dorsal series first 19 

 suckers unmodified, then 

 giving way to stout, 

 conical papillae scarcely 

 half as long as their 



mates of the opposite ^.^ U.-LoUgo etheridgei $ [4891, 



series (the second papilla, portion of hectocotylized arm of type, 

 which is the longest of showin-r the commencement of the 

 the ventral series, meas- modified papillai ; camera sketch. 

 ures approximately 2.5mm.), but like these ha\ang their suckers 

 reduced to tiny swellings at their apices ; papilla? of both 

 series regularly diminishing in size distallj^ not, so far as the 

 present material shows, again giving Avay to normal suckers 

 toward the extremity. Umbrella rudimentary, except for 

 the usual tentacle sheath. 



Tentacles of moderate length ; Tentacle club (PI. Ixix., 

 fig. 1) well expanded, bearing an outer keel broadened distally 

 into a fleshy membrane, and a well developed trabeculated 



