CEPHALOPODA OF THE HAWAIIAN ISLANDS. 297 



first sight nearly smooth, but upon careful examination revealing a fine regularly granulose papulation, 

 most obscure ventrally. Some examples show indications of low tubercles or cirri on the body, but 

 the only structures of this nature which appear to be at all constant are two soft prominent papilla-like 

 excrescences situated over each eye, one placed just in advance of the eye opening, the other at a slightly 

 greater distance behind this point ; when in a state of retraction these eminences are reduced to rounded 

 tubercles having a pore-like pit or indentation at their apex. (PI. xlviii, fig. 3.) Mantle opening very 

 small, semicircular, closely embracing the base of the funnel, from which, however, it tends in preserved 

 material to contract away, exposing even the basal folds of the latter. (PI. xlvii, fig. 1.) 



Head large, broad, flattened; separated from the body in the nuchal region by a slight lateral con- 

 striction. Eyes large, the integument covering them being usually much puckered about the rather 

 small opening. Funnel large and of robust outline, but short, broad, compressed; broadly adherent 

 above to the head and bound to the latter by loose folds of the integument even as far forward as the 

 basal portion of the umbrella; its extremity is free and reaches a little less than half way to the margin 

 of the latter. Funnel organ well developed and of a very distinctive type; it comprises two narrow 

 but conspicuous V-shaped pads lying on the dorsal inner wall 

 of the funnel cavity, near the tip; they are entirely similar to 

 one another and unconnected. (Text fig. 15, also pi. xlvtii, 



fig- 4.) 



Arms quite short for a Polypus, only about two to two and 

 one-half times as long as the head and body; stout, rapidly 

 tapering, the extremities little attenuate; dimensions nearly 

 equal, but exhibiting considerable variability, the third pair 

 apt to be slightly the shortest; connected at base by a wide 

 semitransparent membranous umbrella, extending between 

 the arms about equally all round for from one-third to nearly 

 one-half of their length, but usually of slightly less extent 

 ventrally; this interwebbing is continuous with a conspicuous 

 fleshy fold which extends along the outer margins of all the FlG - 'S-Poly^us hoylet [176]. outline drawing 

 .,,., 01 ji-ii °f funnel laid open medioventrally to expose 



arms to their extremities. Suckers moderately large, numer- the funnel organ X" 



ous, closely set; regularly alternating in two rows, except at 



the base, where the first three appear in a single row; soft, but well separated; moderately elevated. 

 According to my observations none of the suckers in the male show any appreciable enlargement or 

 other differentiation one from another. (PI. lv, fig. 1.) 



Third right arm in the male notably shorter and stouter than its mate of the opposite side and promi- 

 nently hectocotylized, the modification affecting only the tip of the arm and the usual sperm canal 

 formed along the edge of the marginal membrane. The organ at the tip is bluntly conical, somewhat 

 spoon shaped, and the broad excavation on its inner face scarcely or not at all ridged; such ridges, if 

 they occur at all in the larger specimen are rendered very obscure by the loose consistency of the integ- 

 ument, and in the smaller male one or two transverse grooves only may be made out. The relative 

 measurements of the hectocotylus are given in the table of measurements below. With age the ligula 

 becomes apparently somewhat more elongate, as in the smaller male it is very short and pyramidal. 

 The sperm canal terminates distally in the usual basal papilla or calamus, which is here acutely conical, 

 with its inner surface deeply grooved. (PI. xlviii, fig. 2.) 



Color of preserved specimens a brownish red above, slightly paler or more pinkish below and on the 

 inner surface of the umbrella; no definite color pattern or even any mottlings or other ornamentation 

 of the sort. Entire surface closely punctate with small round reddish brown chromatophores, especially 

 on the dorsal aspect, where they are largely distributed in veins or obscure cloudings, the interstices 

 between which appear as pale reticulations or marblings against a darker background, a feature scarcely 

 to be distinguished without carefully and firmly smoothing out the skin by the fingers. 



