294 BULLETIN OF THE BUREAU OF FISHERIES. 



Polypus ornatus (Gould 1852)." (PI. xlvi.) 



Octopus ornatus Gould 1852. p. 476, figs. 590, 590a. 



Octopus ornatus Tryon 1K79, 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. Funnel 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. 1), 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 unequal, the order of length 1, 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 rims 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 counted 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- 



a The original description of Gould (1S52, 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 fivelongitudinal, 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 [to] this in form and coloration, except O. macropus Risso. The comparative length 

 of arms is different (1, 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. '' 



