CEPHAI^OPODA OP THE HAWAIIAN ISLANDS. 
317 
adherent. Locking apparatus a slightly curved cartilaginous groove at either side of the base of the 
funnel with conspicuous ridges to correspond on the inner wall of the mantle considerably posterior 
to its margin. 
Sessile arms short, connected by a well-developed basal web reaching beyond the middle of the 
dorsal arms, but diminishing ventrally and entirely absent between the ventral pair; conspicuously 
unequal, the order of length 3, 4, 2, i; third 
pair much the stoutest and longest and with 
somewhat larger suckers than the remainder, 
also differing in the possession of a prominent 
membranous keel bordering their outer mar- 
gins; ventral arms also keeled in somewhat 
similarfashion, but less prominently. Suckers 
in two rows on all the arms, crowded; ex- 
tremely minute, especially on the dorsal and 
ventral arms; those of tire second arms slightly 
larger, and those on the third pair distinctly 
the largest of all, although not very conspicu- 
ously so (most of the suckers on this pair of 
arms have been lost through abrasion, so that 
it can not be determined whether or not any of 
the more distal ones are subject to enlarge- 
ment or other special modification ; the stumps 
of the pedicels, however, are entirely similar 
to one another); individual suckers spherical, 
with small openings and smooth horny rings; 
pedicels very short. 
Tentacles exceedingly long and slender; 
tapering; slightly thickened at the base; club 
but little if any wider than the stalk, velvety 
in appearance, and under a high power lens 
seen to be armed with about eight rows (fewer 
at base) of extremely minute crowded suck- 
ers, those near tlie base somewhat the largest, 
thence gradually and regyilarly diminishing in 
size toward the tip. (PI. l, fig. 2.) 
Ink sac large, by no means covered by the 
photogenic glands, which, though distinct in 
the present material, appear to be of small 
size and very anterior position. 
Gladius not observed; probably absent as 
in 5 . leucoptera. 
Color in alcohol for the most part a brown- 
ish white ; suffused about the eyes, base of the 
fins, and notably about the ventral shield, 
with a purplish black; fins unmarked; mantle 
closely speckled above and below with small brownish chromatophores of two main types, which become 
rather fewer in number posteriorly and on the sides; those of the one type are paler, larger, more suffused, 
and more evenly distributed; the others are darker, much smaller, more distinct, and more exclusively 
confined to certain areas, such as the dorsum and especially the ventral shield, where they are very 
thickly and evenly distributed; the difference is very apparent, but I am not sure what morphological 
60289° — Bull. 32 — 14 21 
Fig. 2&.Slololeuthis iris, ventral view of type [31], X 4. 
by R. L. Hudson. 
Drawn 
