CEPHALOPODA OF THE HAWAIIAN ISLANDS. 
349 
Tentacles rather short, stout, about twice as long as the arms, as compared with which they are 
larger and heavier in every way; stalks nearly cylindrical. Clubs large, well expanded; bordered by 
a narrow frill-like web or keel along either margin of the sucker-bearing area, supplemented dorsally 
by a wider gracefully crenulate membrane which has its origin outside the former and lies parallel 
to it along the distal two-thirds of the club. Suckers small, in four distinct but rather crowded rows 
on the club ; the two median series slightly the larger, but the suckers in all four rows attaining their 
maximum near the middle of the club; distally they gradually diminish in size, and also proximally, 
where they steadily become more widely spaced, extending down the flattened inner surface of the 
stalk for about half its length (exclusive of the club) ; the four-rowed condition really persists throughout, 
but on account of the tendency of the various series to press in toward the center at the same time with 
the increase in interspacing of the suckers, the arrangement soon appears to be biserial and maintains 
this appearance throughout most of the length of the stalk. Proximal to the point where the marginal 
membrane of the club comes to an end some 20 to 23 of these alternating pairs of suckers may be counted. 
Homy rings of the larger suckers minutely dentate on the upper margin with 12 to 14 sharp-curved 
elongate teeth, which become nearly or quite obsolete below. 
Color of preserved specimen a soiled semitranslucent white. Chromatophores very minute and 
sparsely distributed ; they apparently exhibit no very definite arrangement. 
Two large photogenic organs form a conspicuous brownish patch nearly covering the ventral sur- 
face of each eyeball and visible even through the outer integument which overlies them. The larger 
is roughly semicircular in outline, its flatter anterior margin somewhat concave, and with the convex 
side of the crescent-shaped smaller organ closely applied within it. The outline of both organs is in 
the main similar to those of D. pellucida as figured by Chun, but considerably more elongate. 
Measurements of Megalocranchia fisheri. 
mm. 
Total length 73 
Length of mantle (dorsal) 47 
Maximum width of mantle 23 
Extreme length of fins 12.5 
Width across fins 12.5 
Length of head (median) 4 
Width of head across eyes 15 
Length of — 
Right dorsal arm 6 
Left dorsal arm 6 
Length of— mm. 
Right second arm 8 
Left second arm 8 
Right third arm 13 
Left third arm 12 
lUght ventral arm 12 
Left ventral arm 12.5 
Tentacle 27 
Sucker-bearing area of tentacle 18 
Tentacle club 8 
Funnel 8 
Type. — Catalogue No. 214316, United States National Museum (S. S. B. 106). 
Type locality. — A ffoaircjj' station 3883, 277 to284 fathoms, bottom of globigerinaooze, off Mokuhooniki 
Islet, Pailolo Channel, April 16, 1902; one specimen. 
Distribution. — Hawaiian Islands (Albatross). 
Material examined. — The type is unique. 
Remarks. — This species is a typical Megalocranchia, showing exceedingly close affinity to both the 
M. maxima Pfeffer and the more recently described M. pellucida (Chun). The latter species is peculiar 
in that the homy rings of the tentacular suckers are bluntly toothed, lacking the long acute teeth which 
are characteristic of both the other species. The following rather trivial features distinguish M. fisheri 
from M. maxima : ( 1 ) The longer tentacles. (2 ) The longer ventral arms. In his description of M. maxima 
Pfeffer says regarding the arms that “4 und 2 sind wenig verschieden, ” while in the present species 
the disproportion between the arms of these pairs is conspicuous. In my first diagnosis I gave the 
arm formula as 4, 3, 2, i. In reality this is true of the left side only, the right arms standing 3, 4, 2, i, 
but in both cases the difference between the third and ventral arms is so slight as scarcely to be worth 
60289° — Bull. 32 — 14 23 
