294 bulletin of the bureau of fisheries. 
Polypus omatus (Gould 1852 ).« (PI. xlvi.) 
Octopus ornatus Gould 1852, p. 476, figs. 590, 5903. 
Octopus ornatus Tryon 1879, p. 112, pi. 30, figs. 29, 30 (after Gould). 
Polypus ornatus Berry 1909, p. 418 (locality record). 
Body of moderate size, subglobose, more expanded and rounded posteriorly. Mantle opening 
simple, moderately wide, extending on either side to a point about halfway between the eye aperture 
and the funnel. 
Head fairly large, rounded, not excavated above or below; the eyes fairly prominent, with small 
openings; head and body separated in the nuchal region by a decided constriction. Ftmnel long, 
extending for about two-thirds of the distance to the ventral margin of the umbrella, conical and taper- 
ing, with a broad base; adherent to the ventral surface of the head for more than half its length; aper- 
ture small. Funnel organ well developed, comprising a large W-shaped pad lying nearly midway of 
the dorsal wall; the median lobe is decidedly longer than the lateral wings. (Fig. 14.) 
Arms extremely long, very graceful (pi. XLVi, fig. i), dorsal pair perhaps as much as seven times 
the length of head and body taken together, extremely slender and attenuate, the tips almost fili- 
form; disproportionately imequal, the order of length i, 2, 3, 4; dorsal arms conspicuously the stoutest 
and longest, the remaining arms exhibiting a decided but very regular decrease in size as we progress 
ventrally; the ventral arms very slender, less than three-fifths as long as the dorsal pair. Umbrella 
of small extent; best developed between the dorsal arms and least ventrally, thus giving the mouth 
the apparent position noted by Gould; it is continuous with a loose, very narrow fold of membrane 
which runs distad along the outer margins of the arms for a short distance, soon becoming nearly or quite 
obsolete. Suckers of moderate size, somewhat elevated, and with discoid but fairly deep cups; very 
numerous and somewhat crowded, 312 being coimted on the left dorsal arm of the medium-sized speci- 
men without the aid of a lens, less than a third of them occurring on the distal half of the arm; they 
are consistently in two rows even at the base near the mouth and at the extreme tip as well; a conspicu- 
ous maximum in size is attained a little distance beyond the margin of the umbrella. Third right arm 
in the male about a third shorter than its mate of the opposite side ; on this arm a shallow marginal fold 
incloses a groove running along the outer ventral angle of the arm; this fold is barely distinct from the 
main body of the arm itself and is the sole remaining vestige of the marginal web; beginning at the 
umbrella margin, it terminates in the hectocotylus as the median groove of the flattened conical basal 
papilla (calamus) of the latter; the principal portion of the hectocotylus (ligula) is a conspicuously thick- 
“ The original description of Gould (1852, p. 476) is as follows: 
“Body subglobose, the length exceeding the breadth about one-twelfth. Head two-thirds as long as the body, and about 
half its breadth, of nearly equal width throughout, the eyes being but very slightly prominent. Inferior opening broad, the lip 
transverse and simple; eyes small, the pupil black, with a silvery iris. Mouth small, situated at the lower third of the umbrella, 
which is rather small, but well-marked, the membrane not prolonged up the arms. Arms compressed, long and slender, attenu- 
ated to a thread, comparative length 2, 4, 3, i, differing much in size, the upper ones being very robust, the second, third, and 
fourth pairs being successively more slender, the latter being remarkably slender, not half the size of the upper ones. Cupules 
of medium size, nearly sessile, crowded, very numerous, extending to the tips of the arms; they commence in a double series on 
the upper arms, while on the lower ones the first six are in a single series. The surface is coarsely reticulate-papillose, with a 
series of oblong-oval, smooth, and colorless patches along the back of the arms and around the sac, somewhat resembling bullae. 
The ground color is deep orange; beneath somewhat clouded with white; above variegated with five longitudinal, buff stripes, 
the median one extending to between the eyes, the two lateral ones curving on each side, like meridian lines, and extending only 
to the neck; between these lines, around the middle of the sac, are deep brown patches, and also between the bases of the arms; 
there are also brown mottlings along the back of the arms. These, with the pale, bubble-like patches around the base of the sac 
and along the arms, give a very gay and diversified coloring. 
“ Length of sac to inferior opening, one and a half inches; length along the back to the umbrella, two and a half inches; 
breadth of sac, one and three-fourths inches; breadth of neck, one inch; breadth of umbrella from side to side, three inches; 
breadth above mouth, two inches; below mouth, one inch; length of arms, upper pair, twenty inches; upper lateral, twenty-four 
inches; lower lateral, about twenty inches; lower pair, twenty-one inches. 
“Obtained at the Sandwich Islands at Oahu and Maui. 
“No other described species approaches fto] this in form and coloration, except t?. macropus Risso. The comparative length 
of arms is different (i, 2, 3, 4), the body is more elongated, and there are no cirrhi about the eyes in the latter species, besides a 
sufficiently well-marked distinctness of coloration. Described from specimens preserved in spirits, and from a coloured drawing. 
